A projectile of range R bursts at its highest point in two fragments. Both pieces at the time of bursts have the velocity in the horizontal direction. The heavier is double the mass of the lighter. Lighter fragment falls at R/2 horizontal distance from the point of projection in the opposite side of projection. The distance, where other part falls, from point of projection.
(A) 7R / 4
(B) 5R / 4
(C) 8R / 4
(D) 6R / 4
