Assertion: Smaller the organism higher is the rate of metabolism per gram weight.Reason: The heart rate of a six month old baby is much higher than that of an old person. ?

• A. Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
• B. Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
• C. Assertion is true statement but Reason is false
• D. Both Assertion and Reason are false statements