A body of mass m having an initial velocity v, makes head on collision with a stationary body of mass M. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will happen only when

• A

  $\mathrm{m}>>\mathrm{M}$

• B

  $\mathrm{m}<<\mathrm{M}$

• C

  $\mathrm{m}=\mathrm{M}$

• D

  $\mathrm{m}=\frac{1}{2}\mathrm{M}$