JEE Main 2021 Physics question

A boy is rolling a 0.5 kg ball on the frictionless floor with the speed of 20 . The ball gets deflected by an obstacle on the way. After deflection it moves with 5% of its initial kinetic energy. What is the speed of the ball now ?

• (A)19.0
• (B)4.47 Correct
• (C)14.41
• (D)1.00