100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS Page 361 InterviewSolution

18001.	Directions : Each of these questions contains two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below. (a) Assertion is correct, reason is correct; reason is a correct explanation for assertion. (b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion (c) Assertion is correct, reason is incorrect (d) Assertion is incorrect, reason is correctAssertion: The domain of the function sec–1 x is the set of all real numbers.Reason: For the function sec–1 x, x can take all real values except in the interval (–1, 1).
Answer» (d) The domain of the function sec^–1x is R – (–1, 1).

Discussion

18002.	If A and B are symmetric matrices, such that AB and BA are both defined, then prove that AB- BA is a skew-symmetric matrix.
Answer» Since A & B are symmetric matrices A = A’ & B = B’ To prove (AB – BA)’ = – (AB – BA) L.H.S = (AB – BA)’ (AB)’ – (BA)’ = B’A’-A’B’ = BA – AB = – (AB – BA) = R.H.S Thus proved.

18002.

If A and B are symmetric matrices, such that AB and BA are both defined, then prove that AB- BA is a skew-symmetric matrix.

Answer»

Since A & B are symmetric matrices A = A’ & B = B’

To prove (AB – BA)’ = – (AB – BA)

L.H.S = (AB – BA)’

(AB)’ – (BA)’

= B’A’-A’B’

= BA – AB

= – (AB – BA)

= R.H.S

Thus proved.

Discussion

18003.	Let A = \(\begin{pmatrix}2&-2\\1&-1\end{pmatrix}\) and B =\(\begin{pmatrix}-1&2\\-1&2\end{pmatrix}\)Then the number of elements in the set {(n,m) : n,m \(\in\){1,2,.....,10} and nAn + mBm = 1 is ____
Answer» Correct answer is 1 A² = A and B² = B Therefore equation nAⁿ + mB^m = I becomes nA + mB = I, which gives m = n = 1 Only one set possible

18003.

Let A = \(\begin{pmatrix}2&-2\\1&-1\end{pmatrix}\) and B =\(\begin{pmatrix}-1&2\\-1&2\end{pmatrix}\)Then the number of elements in the set {(n,m) : n,m \(\in\){1,2,.....,10} and nAn + mBm = 1 is ____

Answer»

Correct answer is 1

A² = A and B² = B

Therefore equation nAⁿ + mB^m = I becomes

nA + mB = I, which gives m = n = 1

Only one set possible

Discussion

18004.	We use alloys for making standard resistors because they have (i) low temperature coefficient of resistivity and high specific resistance (ii) high temperature coefficient of resistivity and low specific resistance (iii) low temperature coefficient of resistivity and low specific resistance (iv) high temperature coefficient of resistivity and high specific resistance
Answer» Answer is (i) low temperature coefficient of resistivity and high specific resistance Alloys have low temperature coefficient of resistivity and high specific resistance. If α = low , the value of ‘R’ with temperature will not change much and specific resistance is high then required length of the wire will be less.

18004.

We use alloys for making standard resistors because they have (i) low temperature coefficient of resistivity and high specific resistance (ii) high temperature coefficient of resistivity and low specific resistance (iii) low temperature coefficient of resistivity and low specific resistance (iv) high temperature coefficient of resistivity and high specific resistance

Answer»

Answer is (i) low temperature coefficient of resistivity and high specific resistance

Alloys have low temperature coefficient of resistivity and high specific resistance. If α = low , the value of ‘R’ with temperature will not change much and specific resistance is high then required length of the wire will be less.

Discussion

18005.	By increasing the temperature, the specific resistance of a conductor and a semiconductor- (i) increases for both. (ii) decreases for both. (iii) increases for a conductor and decreases for a semiconductor. (iv) decreases for a conductor and increases for a semiconductor.
Answer» Answer is (iii) increases for a conductor and decreases for a semiconductor. Specific resistance of a conductor increases and for a semiconductor decreases with increase in temperature because for a conductor, a temperature. coefficient of resistivity α = + ve and for a semiconductor, α = -ve

18005.

By increasing the temperature, the specific resistance of a conductor and a semiconductor- (i) increases for both. (ii) decreases for both. (iii) increases for a conductor and decreases for a semiconductor. (iv) decreases for a conductor and increases for a semiconductor.

Answer»

Answer is (iii) increases for a conductor and decreases for a semiconductor.

Specific resistance of a conductor increases and for a semiconductor decreases with increase in temperature because for a conductor, a temperature.

coefficient of resistivity α = + ve

and for a semiconductor, α = -ve

Discussion

18006.	The best instrument for accurate measurement of EMF of a cell is-
Answer» Potentiometer. as a voltmeter draws some current in cell it can not givethe accurate rating. a potentiometer is the best option as during the measurement by potentiometer no current flows through it.

Discussion

18007.	Norton’s theorem replaces a complicated circuit facing a load by an a. Ideal voltage source and parallel resistor b. Ideal current source and parallel resistor c. Ideal voltage source and series resistor d. Ideal current source and series resisto
Answer» (b) Ideal current source and parallel resistor

Discussion

18008.	Derivations are a. Discoveries b. Inventions c. Produced by mathematics d. Always called theorems
Answer» (c) Produced by mathematics

Discussion

18009.	Name the heavy water plants in India.
Answer» a. Nangal. b. Kota. c. Baroda. d. Tuticorn. e. Talcher. f. Thal (under construction). g. Hazira (under construction). h. Malugum (under construction).

18009.

Name the heavy water plants in India.

Answer»

a. Nangal.

b. Kota.

c. Baroda.

d. Tuticorn.

e. Talcher.

f. Thal (under construction).

g. Hazira (under construction).

h. Malugum (under construction).

Discussion

18010.	What precautions should be taken while working in high tritium areas?
Answer» Use respirators, plastic suits, VP suits if concentration of tritium is very high. Avoid getting hurt while working because tritium may go through the skin by sweat to the blood. If by chance there is tritium intake in the body drink lots of fluids.

Discussion

18011.	What is ice plugging?
Answer» If there is a need to repair a valve of D₂0 PHT system, there are no other valves to shut of D₂0. So we use plastic bags on pipes and it has dry ice. Then liquid nitrogen is poured inside the bag. Due to the low temperature the D₂0 inside pipeline solidifies preventing any flow of D₂0 when valve is removed. This is called the ice plugging.

Discussion

18012.	What is the amount of D20 used in moderator?
Answer» 140 tonnes.

Discussion

18013.	Name the D20 recovery methods.
Answer» a. Manual mopping and vacuum cleaning. b. Active drainage recovery. c. Vacuum mopping recovery. d. Dryers recovery. e. Vapour recovery.

18013.

Name the D20 recovery methods.

Answer»

a. Manual mopping and vacuum cleaning.

b. Active drainage recovery.

c. Vacuum mopping recovery.

d. Dryers recovery.

e. Vapour recovery.

Discussion

18014.	Name the methods by which D20 leak can be detected.
Answer» a. By beetles. b. D₂0 losses through stack monitoring. c. Tritium monitoring. d. In heat exchangers the leakage can be found by taking samples of process water from all heat exchanges and counting the tritium activity.

18014.

Name the methods by which D20 leak can be detected.

Answer»

a. By beetles.

b. D₂0 losses through stack monitoring.

c. Tritium monitoring.

d. In heat exchangers the leakage can be found by taking samples of process water from all heat exchanges and counting the tritium activity.

Discussion

18015.	Why spillage of D20 is to be avoided?
Answer» Cost consideration: D₂0 very costly and very valuable. Cleaning of spillage also cost and extra manpower to be deployed. Tritium hazard: D₂0 contains tritium, which when spilled becomes tritiated vapour and finds access through human body. Tritium is a radioactive material. It is a beta emitter.

18015.

Why spillage of D20 is to be avoided?

Answer»

Cost consideration: D₂0 very costly and very valuable. Cleaning of spillage also cost and extra manpower to be deployed.

Tritium hazard: D₂0 contains tritium, which when spilled becomes tritiated vapour and finds access through human body. Tritium is a radioactive material. It is a beta emitter.

Discussion

18016.	Define reactor grade and down graded D20.
Answer» Reactor grade D₂0: If the isotopic purity of a given D₂0 is more than or equal to 99.7% then the D₂0 is reactor grade D₂0. Down grade D₂0: If the isotopic purity of a given D₂0 is less than 99.7% then the D₂0 is downgraded.

18016.

Define reactor grade and down graded D20.

Answer»

Reactor grade D₂0: If the isotopic purity of a given D₂0 is more than or equal to 99.7% then the D₂0 is reactor grade D₂0.

Down grade D₂0: If the isotopic purity of a given D₂0 is less than 99.7% then the D₂0 is downgraded.

Discussion

18017.	One way to short a device is a. With a cold-solder joint b. With a solder bridge c. By disconnecting it d. By opening it
Answer» (b) With a solder bridge

Discussion

18018.	What is the first aid for snakebite?
Answer» Bath the wound and constrictive bandage. Give warm drinks and rest to the patient and artificial breathing if necessary.

Discussion

18019.	How D20 vapour is recovered?
Answer» Dryer recovers D₂0 vapour.

Discussion

18020.	Stop talking and _____ with your work. A) get on B) get away C) get after D) get back
Answer» Correct option is A) get on

Discussion

18021.	Some societies adopt child rearing practices that foster skills of speed, minimal moves, and mental manipulation, promoting a type of behavior called ..... a. integral intelligence b. technological intelligence c. emotional intelligence d. contextual intelligence
Answer» b. technological intelligence

Discussion

18022.	To start on a journey is to ______. A) set in B) set by C) set off
Answer» Correct option is C) set off

Discussion

18023.	Giftedness from the teachers’ point of view depends on a combination of ........ a. high ability, high creativity, high commitment b. high ability, high creativity, high cooperation c. high ability, high commitment, high talent d. high ability, high creativity, high dependence
Answer» a. high ability, high creativity, high commitment

Discussion

18024.	When the aircraft leaves the ground it ______. A) takes off B) takes over C) takes in
Answer» Correct option is A) takes off

Discussion

18025.	In Jensen’s model, Level II represents ...... a. emotional competence b. social competence c. cognitive competence d. associative learning
Answer» (c) cognitive competence

Discussion

18026.	I don’t believe a word you’re saying. I think you’ve made the whole thing ______. A) for B) up C) out D) down
Answer» Correct option is B) up

Discussion

18027.	To show your ticket and get your seat at the airport is to ______. A) check out B) check off C) check in
Answer» Correct option is C) check in

Discussion

18028.	Come ______ and sit down! A) here B) her C) hair D) heir
Answer» Correct option is A) here

Discussion

18029.	........... involves seeking information from a person on a one-to-one basis. a. Case study b. Self -Report c. Interview d. Psychological test
Answer» (c) Interview

Discussion

18030.	........ and performance tests help reduce the cultural bias usually associated with intelligence tests. a. Non-verbal b. Group c. Individual d. Verbal
Answer» (b) decrease in birth rate

Discussion

18031.	Find the time constant for the given RC circuits in correct order (in `mus`) `R_(1)=1Omega,R_(2)=2Omega,C_(1)=4muF,C_(2)=2muF`A. `18,4,8//9`B. `18, 8//9,4`C. `4,18, 8//9`D. `4,8//9,18`
Answer» Correct Answer - B b. We know that time constant of an RC circuit is RC. Find equivalent resistance and capacitance in each case and then determine the time constant.

Discussion

18032.	What are the different changes a child passes through from the age of one to the age of sixteen?
Answer» For girls Her breasts begin to develop. She gets hair in her armpits, on her legs, and on her pubic area. She has her first menstrual period. She may develop acne. For boys His testicles and penis increase in size. He gets hair in his armpits, on his face, and on his pubic area. He develops a small amount of breast tissue. His voice deepens. His muscles strengthen. He may develop acne.

18032.

What are the different changes a child passes through from the age of one to the age of sixteen?

Answer»

For girls

Her breasts begin to develop.
She gets hair in her armpits, on her legs, and on her pubic area.
She has her first menstrual period.
She may develop acne.

For boys

His testicles and penis increase in size.
He gets hair in his armpits, on his face, and on his pubic area.
He develops a small amount of breast tissue.
His voice deepens.
His muscles strengthen.
He may develop acne.

Discussion

18033.	Children _____ sixteen years _____ age are not admitted _____ their parents. A) over / with / without B) at / of / with C) under / of / without D) of / at / with
Answer» Correct option is C) under / of / without

Discussion

18034.	Which of the following recently received permission from SEBI to exit business?1. Bombay Stock Exchange2. Calcutta Stock Exchange3. Delhi Stock Exchange4. National Stock Exchange
Answer» Correct Answer - Option 3 : Delhi Stock Exchange The correct answer is Delhi Stock Exchange. Delhi Stock Exchange (DSE) was located in New Delhi and was allowed to exit the business by SEBI in January 2017. It was incorporated on 25 June 1947. It is India's fifth exchange. The exchange is one of the premier stock exchanges in India. The Delhi Stock Exchange is well connected to 50 cities with terminals in North India. The exchange has over 3,000 listed companies. It has received the market regulator's permission from BSE and has become a member. Now it facilitates the DSE members to trade on the BSE terminals. The exchange is also considered the same from NSE. The Securities and Exchange Board of India (SEBI) is the regulator for the securities market in India. It was established in 1988 and given statutory powers on 30 January 1992 through the SEBI Act, 1992.

18034.

Which of the following recently received permission from SEBI to exit business?1. Bombay Stock Exchange2. Calcutta Stock Exchange3. Delhi Stock Exchange4. National Stock Exchange

Answer» Correct Answer - Option 3 : Delhi Stock Exchange

The correct answer is

Delhi Stock Exchange.

Delhi Stock Exchange (DSE) was located in New Delhi and was allowed to exit the business by SEBI in January 2017.
It was incorporated on 25 June 1947.
It is India's fifth exchange. The exchange is one of the premier stock exchanges in India.
The Delhi Stock Exchange is well connected to 50 cities with terminals in North India.
The exchange has over 3,000 listed companies.
It has received the market regulator's permission from BSE and has become a member.
Now it facilitates the DSE members to trade on the BSE terminals. The exchange is also considered the same from NSE.

The Securities and Exchange Board of India (SEBI) is the regulator for the securities market in India.
It was established in 1988 and given statutory powers on 30 January 1992 through the SEBI Act, 1992.

Discussion

18035.	The human body is made _____ a number of different systems. A) off B) up of C) from D) out of
Answer» Correct option is B) up of

Discussion

18036.	The rider fell _____ his horse as it was jumping_____ a stream. A) from / through B) off / over C) out of / on D) of / from
Answer» Correct option is B) off / over

Discussion

18037.	Ssh! You mustn’t _____ a noise. The baby’s asleep. A) do B) make C) get D) hear
Answer» Correct option is B) make

Discussion

18038.	If you’re sure he’ll be back _____ then, I’ll wait, thank you. A) until B) till C) to D) by
Answer» Correct option is D) by

Discussion

18039.	If you’re sure the trip isn’t going to cost more than ten pounds, then you can count me ______. A) in B) off C) up D) with
Answer» Correct option is A) in

Discussion

18040.	From which of the following places were slaves captured and brought to USA? (A) Asia (B) Portugal (C) Spain (D) Africa
Answer» From Africa places were slaves captured and brought to USA.

Discussion

18041.	The introduction of which new technology in England angered women? (A) The spinning Jenny (B) The underground railway (C) The steam jenny (D) None of these
Answer» The introduction of the spinning Jenny new technology in England angered women.

Discussion

18042.	A change in the state of a system at constant volume is called (a) isobaric process (b) isochoric process (c) isothermal process (d) adiabatic process.
Answer» (b) isochoric process

Discussion

18043.	A gas expands from pressure p1 to pressure p2 \(\left(p_2 = \cfrac{p_1}{10}\right)\) If the process of expansion is isothermal, the volume at the end of expansion is 0.55 m3. If the process of expansion is adiabatic, the volume at the end of expansion will be closer to (a) 0.45 m3 (b) 0.55 m3 (c) 0.65 m3 (d) 0.75 m3.
Answer» Correct option is (a) 0.45 m³

Discussion

18044.	When a system is taken from state A to state B along the path A-C-B, 180 kJ of heat flows into the system and it does 130 kJ of work. How much heat will flow into the system along the path A-D-B if the work done by it along the path is 40 kJ ? (a) 40 kJ (b) 60 kJ (c) 90 kJ (d) 135 kJ.
Answer» Correct option is (c) 90 kJ

Discussion

18045.	During the adiabatic cooling of moist air (a) DBT remains constant (b) specific humidity remains constant (c) relative humidity remains constant (d) WBT remains constant.
Answer» (d) WBT remains constant. All common refrigerants like F₁₁, F₁₂, F₂₂, NH₃ etc. have approximately the same C.O.P. ranging from 4.76 to 5.09 and H.P./ton varies from 0.99 to 1.01. The electric resistance of the refrigerants is an important factor when it is used in hermetically sealed unit where the motor is exposed to the refrigerant.

18045.

During the adiabatic cooling of moist air (a) DBT remains constant (b) specific humidity remains constant (c) relative humidity remains constant (d) WBT remains constant.

Answer»

(d) WBT remains constant.

All common refrigerants like F₁₁, F₁₂, F₂₂, NH₃ etc. have approximately the same C.O.P. ranging from 4.76 to 5.09 and H.P./ton varies from 0.99 to 1.01.

The electric resistance of the refrigerants is an important factor when it is used in hermetically sealed unit where the motor is exposed to the refrigerant.

Discussion

18046.	A process during which no heat is transferred to or from the gas is called an (a) isochoric process (b) isobaric process (c) adiabatic process (d) isothermal process.
Answer» (c) adiabatic process

Discussion

18047.	An adiabatic process is one which follows the relation (a) p/ρ = constant (b) p/ργ = constant (c) p/ρn = constant (n ≠ γ) (d) v = constant.
Answer» (b) p/ρ^γ = constant

Discussion

18048.	Power of the only force acting on a particle of mass m=1 kg moving in straight line depends on its velocity as `P=v^(2)` where v is in m/s and P is in watt. If initial velocity of the particle is 1m/s, then the displacement of the particle in `ln2` second will be :A. `(ln2-1)m`B. `(ln2)^(2)m`C. 1mD. 2m
Answer» P=Fv `v^(2)=Fv` Ma=v `1xxv(dv)/(dx)=v` `int_(1)^(v)dv=int_(0)^(x)dx` v-1=x v=x+1 `(dx)/(dt)=x+1` `int_(0)^(x)(dx)/(x+1)=int_(0)^(t) dt` `ln(x+1)-ln(0+1)=t` `x+1=e^(t)` `x=e^(t)-1` at `t=ln2` `x=2-1=1 m`

Discussion

18049.	Explain in case study of remedy for plastic waste.
Answer» Poly blend, a find powder of recycled modified plastic, was developed in the factory. Polyblend is mixed with bitumen that is used to lay roads. It increases the water repelling property of bitumen, and helped to increase road life by a factor of three. The raw material used for polyblend is plastic film waste. It is economical also.

Discussion

18050.	Mention the criteria for a molecule that acts as the genetic material.
Answer» It should be able to generate its replica (replication). It should be chemically and structurally stable. It should provide the scope for slow changes (mutation) that required for evolution.

Discussion

Explore topic-wise InterviewSolutions in .

If A and B are symmetric matrices, such that AB and BA are both defined, then prove that AB- BA is a skew-symmetric matrix.

Let A = \(\begin{pmatrix}2&amp;-2\\1&amp;-1\end{pmatrix}\) and B =\(\begin{pmatrix}-1&amp;2\\-1&amp;2\end{pmatrix}\)Then the number of elements in the set {(n,m) : n,m \(\in\){1,2,.....,10} and nAn + mBm = 1 is ____

By increasing the temperature, the specific resistance of a conductor and a semiconductor- (i) increases for both. (ii) decreases for both. (iii) increases for a conductor and decreases for a semiconductor. (iv) decreases for a conductor and increases for a semiconductor.

The best instrument for accurate measurement of EMF of a cell is-

Norton’s theorem replaces a complicated circuit facing a load by an a. Ideal voltage source and parallel resistor b. Ideal current source and parallel resistor c. Ideal voltage source and series resistor d. Ideal current source and series resisto

Derivations are a. Discoveries b. Inventions c. Produced by mathematics d. Always called theorems

Name the heavy water plants in India.

What precautions should be taken while working in high tritium areas?

What is ice plugging?

What is the amount of D20 used in moderator?

Name the D20 recovery methods.

Name the methods by which D20 leak can be detected.

Why spillage of D20 is to be avoided?

Define reactor grade and down graded D20.

One way to short a device is a. With a cold-solder joint b. With a solder bridge c. By disconnecting it d. By opening it

What is the first aid for snakebite?

How D20 vapour is recovered?

Stop talking and _____ with your work. A) get on B) get away C) get after D) get back

Some societies adopt child rearing practices that foster skills of speed, minimal moves, and mental manipulation, promoting a type of behavior called ..... a. integral intelligence b. technological intelligence c. emotional intelligence d. contextual intelligence

To start on a journey is to ______. A) set in B) set by C) set off

Giftedness from the teachers’ point of view depends on a combination of ........ a. high ability, high creativity, high commitment b. high ability, high creativity, high cooperation c. high ability, high commitment, high talent d. high ability, high creativity, high dependence

When the aircraft leaves the ground it ______. A) takes off B) takes over C) takes in

In Jensen’s model, Level II represents ...... a. emotional competence b. social competence c. cognitive competence d. associative learning

I don’t believe a word you’re saying. I think you’ve made the whole thing ______. A) for B) up C) out D) down

To show your ticket and get your seat at the airport is to ______. A) check out B) check off C) check in

Come ______ and sit down! A) here B) her C) hair D) heir

........... involves seeking information from a person on a one-to-one basis. a. Case study b. Self -Report c. Interview d. Psychological test

........ and performance tests help reduce the cultural bias usually associated with intelligence tests. a. Non-verbal b. Group c. Individual d. Verbal

Find the time constant for the given RC circuits in correct order (in `mus`) `R_(1)=1Omega,R_(2)=2Omega,C_(1)=4muF,C_(2)=2muF`A. `18,4,8//9`B. `18, 8//9,4`C. `4,18, 8//9`D. `4,8//9,18`

What are the different changes a child passes through from the age of one to the age of sixteen?

Children _____ sixteen years _____ age are not admitted _____ their parents. A) over / with / without B) at / of / with C) under / of / without D) of / at / with

Which of the following recently received permission from SEBI to exit business?1. Bombay Stock Exchange2. Calcutta Stock Exchange3. Delhi Stock Exchange4. National Stock Exchange

The human body is made _____ a number of different systems. A) off B) up of C) from D) out of

The rider fell _____ his horse as it was jumping_____ a stream. A) from / through B) off / over C) out of / on D) of / from

Ssh! You mustn’t _____ a noise. The baby’s asleep. A) do B) make C) get D) hear

If you’re sure he’ll be back _____ then, I’ll wait, thank you. A) until B) till C) to D) by

If you’re sure the trip isn’t going to cost more than ten pounds, then you can count me ______. A) in B) off C) up D) with

From which of the following places were slaves captured and brought to USA? (A) Asia (B) Portugal (C) Spain (D) Africa

The introduction of which new technology in England angered women? (A) The spinning Jenny (B) The underground railway (C) The steam jenny (D) None of these

A change in the state of a system at constant volume is called (a) isobaric process (b) isochoric process (c) isothermal process (d) adiabatic process.

When a system is taken from state A to state B along the path A-C-B, 180 kJ of heat flows into the system and it does 130 kJ of work. How much heat will flow into the system along the path A-D-B if the work done by it along the path is 40 kJ ? (a) 40 kJ (b) 60 kJ (c) 90 kJ (d) 135 kJ.

During the adiabatic cooling of moist air (a) DBT remains constant (b) specific humidity remains constant (c) relative humidity remains constant (d) WBT remains constant.

A process during which no heat is transferred to or from the gas is called an (a) isochoric process (b) isobaric process (c) adiabatic process (d) isothermal process.

An adiabatic process is one which follows the relation (a) p/ρ = constant (b) p/ργ = constant (c) p/ρn = constant (n ≠ γ) (d) v = constant.

Explain in case study of remedy for plastic waste.

Mention the criteria for a molecule that acts as the genetic material.

Let A = \(\begin{pmatrix}2&-2\\1&-1\end{pmatrix}\) and B =\(\begin{pmatrix}-1&2\\-1&2\end{pmatrix}\)Then the number of elements in the set {(n,m) : n,m \(\in\){1,2,.....,10} and nAn + mBm = 1 is ____

Children ___ sixteen years _ age are not admitted ___ their parents. A) over / with / without B) at / of / with C) under / of / without D) of / at / with

The rider fell _ his horse as it was jumping_ a stream. A) from / through B) off / over C) out of / on D) of / from