Assertion : A body, whatever its motion is always at rest in a frame of reference which is fixed to the body itself. Reason : The relative velocity of a body with respect to itself is zero.

• A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion.          
• C. If assertion is true but reason is false.          
• D. If the assertion and reason both are false.          
• E. If assertion is false but reason is true.