A particle of mass m moving with a velocity  $\overrightarrow{\mathrm{V}}$ makes a head on elastic collision with another particle of same mass initially at rest. The velocity of the first particle after the collision will be

• A

  $\overrightarrow{\mathrm{V}}$

• B

  $-\overrightarrow{\mathrm{V}}$

• C

  $-2\overrightarrow{\mathrm{V}}$

• D

  Zero