Assertion (A): The thickness of the atmosphere is maximum over the Equator.
Reason (R): High insulation and strong convection currents occur over the Equator.
The correct option is B
Both A and R are true and R is the correct explanation of A
Explanation- High insolation and strong convection currents result in the expansion of air, at the equator. Thereby the thickness of the atmosphere is maximum over the equator.