Assertion : The average speed of a body over a given interval of time is equal to the average velocity of the body in the same interval of time if a body moves in a straight line in one direction. Reason : Because in this case distance travelled by a body is equal to the displacement of the body.

• 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.