Assertion : In an elastic collision of two bodies, the momentum and energy of each body is conserved.

Reason : If two bodies stick to each other after colliding, the collision is said to be perfectly elastic.

• A

  If both assertion and reason are true and reason is a true explanation of assertion.
   

• B

  If both assertion and reason are true but reason is not the correct explanation of assertion
   

• C

  If assertion is true but reason is false.
   

• D

  If both assertion and reason are false.