A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from :-

Question

( A ) One point propagating in the same direction through slab
( B ) Two points propagating in two different parallel directions
( C ) One point propagating in two different directions through slab
( D ) Two points propagating in two different non parallel directions