Which of the following statement is//are correct?

Options

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

A, B, C, D

Explanation

(a, b, c, d) All fectual statements.