1.

Assertion (A) : Many gemstones are impure form of Al_(2)O_(3). Reason (S) : A downward stream of running water is used in hydraulic washing.

Answer»

Both A and R are correct STATEMENT, and R is the correct EXPLANATION of the A.
Both A and R are correct statement, but R is not the correct explanation of the A.
A is correct, but the R is INCORRECT statement.
A is incorrect, but the R is correct statement.

Answer :C


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