Match List I with List II: (Where a = radius of planet orbit, r = radius of planet, M = mass of Sun, m = mass of planet) Choose the correct answer…

Match List I with List II :

List I	List II
(A) Kinetic energy of planet	(I) $\displaystyle -\mathrm{GMm} / \mathrm{a}$
(B) Gravitation Potential energy of sun-planet system	(II) $\displaystyle \mathrm{GMm} / 2 \mathrm{a}$
(C) Total mechanical energy of planet	(III) $\displaystyle \frac{\mathrm{Gm}}{\mathrm{r}}$
(D) Escape energy at the surface of planet for unit mass object	(IV) $\displaystyle -\mathrm{GMm} / 2 \mathrm{a}$

(Where $\displaystyle \mathrm{a}=$ radius of planet orbit, $\displaystyle \mathrm{r}=$ radius of planet, $\displaystyle \mathrm{M}=$ mass of Sun, $\displaystyle \mathrm{m}=$ mass of planet) Choose the correct answer from the options given below :