Assertion (A) : The value of acceleration due to gravity depends upon mass of the body. reason(R) : Acceleration due to gravity is a constant quantity.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true. ​