Which of the following statement is//are correct?A. A diode is a combination of `p`-and `n`-type semiconductors which is used as a rectifier.B. Transistors are sandwich semiconductors of the type `pnp` or `npn` which are used to detect or amplify radio or audio signals.C. Monoxides of transition metals, all of which posses `NaCl` structures, show very large variations in electrical properties.D. `ReO_(3)` has the conductivity as well as appearance like that of copper.

Which of the following statement is//are correct?A. A diode is a combi

1.	Which of the following statement is//are correct?A. A diode is a combination of `p`-and `n`-type semiconductors which is used as a rectifier.B. Transistors are sandwich semiconductors of the type `pnp` or `npn` which are used to detect or amplify radio or audio signals.C. Monoxides of transition metals, all of which posses `NaCl` structures, show very large variations in electrical properties.D. `ReO_(3)` has the conductivity as well as appearance like that of copper.
Answer» Correct Answer - A::B::C::D (a, b, c, d) All fectual statements.

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