Assertion: The value of acceleration due to gravity is different at different places.
Reason: Earth is flattened at poles and bulging out at the equator.
a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
c) Assertion is true, but the reason is false.
d) Both assertion and reason are false.