The drift current in a p-n junction is
(a) from the n-side to the p-side
(b) from the p-side to the n-side
(c) from the n-side to the p-side if the junction is forward-baised and in the opposite direction if it is reverse biased
(d) from the p-side to the n-side if the junction is forward-baised and in the opposite direction if it is reverse-baised
