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 lower than that of an old person.

Options

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

Answer

C

Explanation

The basal metabolic rate is defined as the energy requirement of the human body at rest and reflects the caloric needs of the body. BMR can be determined by total body weight and the amount of muscle mass. BMR is inversely related with the weight or volume of an organism , i.e., smaller the organism, higher is the basal metabolic rate and vice vers. Heart rate of six month old baby is 110-112 beats/min. Though it is higher than normal adult person, but it is lower than old person. At the age of 60, a man may have maximum heart rate 160 beats/min (avg 120 beats/min.)