The correct option is B Due to inertia of motion upper part of body continues to be in motion in forward direction while feet come to rest as soon as they touch the road
See Newton’s first law of motion according to which “the tendency of a body to continue in its state of rest or of uniform motion in a straight line, is called law of inertia”.
Due to inertia of motion upper part of body continues to be in motion in forward direction while feet come to rest as soon as they touch the road.