
In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in :
Circuit (b) only
Circuit (c) only
Both circuits (a) and (c)
Circuit (a) only
(B) Both circuits (a) and (c) are forward-biased. The potential drop across both the diodes will be the same for circuits (a) & (c)
Circuit (b) is reverse-biased, so there is no current through the circuit.
The correct option is (3)