When a forward bias is applied to a p-n junction, it
(a) raises the potential barrier.
(b) reduces the majority carrier current to zero.
(c) potential barrier is reduced
(d) None of the above.
When a forward bias is applied to a p-n junction, it
(a) raises the potential barrier.
(b) reduces the majority carrier current to zero.
(c) potential barrier is reduced
(d) None of the above.

(c) is the correct option

When a forward bias is applied to a p-n junction, the potential barrier is reduced.

As the applied voltage is opposed by the potential barrier, so the potential barrier across the junction decreases.