(A) : The coefficient of restitution for a perfectly elastic collision is equal to one.
(R ) : In perfectly elastic collisio, kinetic energy before and after the collision remains conserved.

Options

A. Both (A) and (R ) are true and (R ) is the correct explanation of (A)
B. Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
C. (A) is true but (R ) is false
D. (A) is false and (R ) is false

Answer

B