Two Mirrors Are at Right Angles to One Another $\degree$ With Respect to the Normal to the Surface

Multiple Choice

Two mirrors are at right angles to one another.A light ray is incident on the first at an angle of 30 $\degree$ with respect to the normal to the surface.What is the angle of reflection from the second surface?

A) 30 $\degree$
B) 60 $\degree$
C) 45 $\degree$
D) 53 $\degree$
E) 75 $\degree$