Assertion (A):It polar ice cap melts , duration of the day increases.
Reason ( R ) : Moment of inertia increases and angular velocity decreases.

Options

A. Both (A) and (R ) are true and (R ) is the correct explanation of (A)
B. Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
C. (A) is true but (R ) is false
D. Both (A) and (R ) are false

Answer

A