A ball is dropped from a height of 20 m above the surface of water in a lake. The refractive index of water is $$\frac{4}{3}$$. A fish inside the lake, in the line of fall of the ball, is looking at the ball. At an instant, when the ball is 12.8 m above the water surface, the fish sees the speed of ball as-

A

9 m/s

B

12 m/s

C

16 m/s

D

21.33 m/s