A ray of light enters a spherical drop of a liquid of refractive index \( \mu=\frac{\sqrt{7}}{2} . \) This ray after getting reflected from back surface comes out as shown. Given \( \sin 41^{\circ}=\sqrt{\frac{3}{7}} \) :-
(A) Ray suffers total internal reflection at back surface.
(B) Total internal reflection at back surface is not possible for any value of \( \phi \).
(C) Total deviation suffered by ray (Refraction + Reflection + Refraction) is minimum, when \( \phi=60^{\circ} \)
(D) When angle of incidence is chosen such that total deviation is minimum. then value of total deviation is \( 136^{\circ} \).
