When a bicycle is in motion, the force of friction exerted by ground on the two wheels is such that, it acts :

Options

A. in the backward direction on the front wheel and in the forward direction on the rear wheels.
B. in the forward direction on the front wheel and in the backward direction on the rear wheels.
C. in the backward direction on both the front and the rear wheels.
D. in the forward direction on both the front and the rear wheels.