Consider the following statements $A$ and $B$. Identify the correct choice in the given answers. A. The refractive index of the extra-ordinary ray depends on the angle of incidence in double refraction. B. The vibrations of light waves acquire one sidedness for both ordinary and extraordinary rays in double refraction.

• A

  $A$ and $B$ are wrong
• Correct answer
  B

  $\mathrm{A}$ and $\mathrm{B}$ are correct
• C

  A is correct and B is wrong
• D

  A is wrong and B is correct

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