Correct option is A
(D), (C), (A), (B)
Forward biased p-n junction;

Zener diode;

Photo diode

Solar cell

(D), (C), (A), (B)
Forward biased p-n junction;

Zener diode;

Photo diode

Solar cell

An intrinsic semiconductor is converted into n-type extrinsic semiconductor by doping it with