Assertion: The instantcous power of an agent is measured as the dot product of instaneous velocity and the force acting on it at that instant.
Reason: The unit of instaneous power is watt.
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 asserti on is true but reason is false
D. If the assertion and reason both are false