The figure below shows three identical balls A , B and C. Initially , the baiis B and C are at rest and the ball A while moving with a veiocity v, collides with ball B. if the collision is perfectiy elastic , then after the collision

Options

A. all the three balls move with velocity `v/2`
B. A comes to rest and `(B + C)` moves with velocity `v/(sqrt2)`
C. A move with velocity v and `(B + C)` moves with velocity v
D. A and B comes to rest and C moves with velocity v

Answer

D