A Ray of Light Is Incident on the Mid-Point of a Glass

Multiple Choice

A ray of light is incident on the mid-point of a glass prism surface at an angle of 20 $\degree$ with the normal.For the glass,n = 1.60,and the prism apex angle is 35 $\degree$ .What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?

A) 38.0 $\degree$
B) 35.1 $\degree$
C) 22.7 $\degree$
D) 12.3 $\degree$