The correct circuit representation of the structure shown in the figure is

Q. The correct circuit representation of the structure shown in the figure is

Ans: Option A

Points to note to solve this question. 1) Emitter and collector are n-type so the transistor will be

n-p-n

∴ Options (3) and (4) are eliminated

2) The diode is connected between base and collector

Base is n-type

Collector is n++ type

Hence collector will be of n-type and base will be p-type.