Assertion: Two `P-N` junction diodes placed back to back, will work as a `NPN` transistor.
Reason: The `P-N` junction of two `PN` junction diodes back to back will form the base of `NPN` transistor.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

D

Explanation

Two PN-junctions placed back to back can not work as NPN transistor because in transistor the width and concentration of doping of P-type semiconductor is less as compared to width doping of N-type semiconductor.