When unpolarised light from air incidents on the surface of a medium of refractive index $\sqrt{3}$, then the reflected light is totally polarised. The angle of refraction is

• Correct answer
  A

  $30^{\circ}$
• B

  $53^{\circ}$
• C

  $60^{\circ}$
• D

  $37^{\circ}$

Hence, the correct answer is option: 'A'.