Assertion Growth of different body parts is differential.
Reason During human growth, muscles show minimum growth, while brain shows maximum growth.

Answer

C

Explanation

The growth rate is not uniform, but it is different at different period of life. So, the growth is differential. In human beings, the muscles show maximum growth, i.e. from 0.8 kg in newly born body to 30 kg in adult, while brain shows minimum growth, i.e. from 0.4 kg in newly born body to 1 kg in adult, from birth to adulthood.