Assertion : Friction is a self-adjusting force.

Reason : Friction does not depend upon mass of the body

• 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.