Assertion : The polar caps of earth are cold in comparison to equatorial plane.
Reason : The radiation absorbed by polar caps is less than the radiation absorbed by equatorial plane.
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 assertion is true but reason is false
D. If the assertion and reason both are false