The ratio of angle of minimum deviation of a prism in air and when dipped in  water will be $\left({ }_{\mathrm{a}}{\mathrm{\mu }}_{\mathrm{g}}=3/2{\text{ and }}_{\mathrm{a}}{\mathrm{\mu }}_{\mathrm{w}}=4/3\right)$

• A

  $\frac{1}{8}$

• B

  $\frac{1}{2}$

• C

  $\frac{3}{4}$

• D

  $\frac{1}{4}$