A spherical planet has a mass $M_P$ and diameter $D_P$. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to

Question

( A ) $\frac{4GM_p}{D_p^2}$
( B ) $\frac{4GM_pm}{D_p^2}$
( C ) $\frac{GM_p}{D_p^2}$
( D ) $\frac{GM_pm}{D_p^2}$