A ray of light is incident on a rectangular glass block at $45^{\circ}$ on glass- air interface. The refractive index of glass is $\sqrt 2$. Then

Question

(a) The ray will emerge back into air without deviation

(b) will be reflected back into glass without emerging into air.

(c) will emerge into air with an angle of refraction equal to $90^{\circ}$

(d)will neither be reflected not refracted but will be absorbed