A bullet of mass 10 gm moving with a horizontal velocity 100m/s passes through a wooden block of mass 100 gm. The block is resting on a smooth horizontal floor. After passing through the block the velocity of the bullet is 10m/s. the velocity of the emerging bullet with respect to the block is

• A

  10 m/s

• B

  9 m/s

• C

  1 m/s

• D

  5 m/s