An equilateral prism ABC is placed in air with its base side BC lying horizontally along x-axis. A light ray $\sqrt{3}z+x=10$  is incident at a point P on face AB of the prism.

If the face BC is silvered then net  deviation of the finally emerging ray with respect to the incident ray on prism is ( $\mu$ of the prism is $\frac{3}{2}$)

• A

  ${120}^o$

• B

  ${60}^o$

• C

  ${150}^o$

• D

  ${180}^o$