A fish is a little away below the surface of a lake. If the critical angle is 49°, then the fish could see things above the water surface within an angular range of ${\mathrm{\theta }}^{\circ }$ where

• A

  $\mathrm{\theta }={49}^{\circ }$

• B

  $\mathrm{\theta }={90}^{\circ }$

• C

  $\mathrm{\theta }={98}^{\circ }$

• D

  $\mathrm{\theta }=24\frac{1^{\circ }}{2}$