Gravitation

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason $\mathbf{R}$



Assertion A : The kinetic energy needed to project a body of mass $m$ from earth surface to infinity is $\frac{1}{2} \mathrm{mgR}$, where R is the radius of earth.



Reason R : The maximum potential energy of a body is zero when it is projected to infinity from earth surface.



In the light of the above statements, choose the correct answer from the options given below