A fish rising vertically to the surface of water in a lake uniformly at the rate of 2 m/s observes a kingfisher diving vertically towards the water at a rate of 10 m/s. If refractive index of water n = 4/3, what will be the actual velocity o f the kingfisher

• A. 10 m/s
• B. 8 m/s
• C. 6 m/s
• D. 9 m/s