Three Materials with N₁ < N₂ < N₃ Are Arranged $\degree$

Multiple Choice

Three materials with n₁ < n₂ < n₃ are arranged in layers of uniform thickness.A light ray in air enters the first layer at an angle of incidence of 30 $\degree$ and the ray eventually exits the third layer at the refracted angle q in air.What is the value of q?

A) Some angle less than 30 $\degree$ .
B) 30 $\degree$ .
C) Some angle more than 30 $\degree$ .
D) Insufficient information to answer.