In each situation of column-I, some charge distributions are given with all details explained in column -II The electrostatic potential energy and its nature is given situation in column -II. Then match situation in column-I with the corresponding results in column-II and indicate your answer by darkening appropriate bubbles in the $4\times 4$ matrix given in the OMR..

	Column-I		Column-II
A)	A thin shell of radius a and having a charge Q uniformly distributed over its surface as shown	P)	$\frac{1}{8\pi {\in }_0}\frac{Q^2}{a}$ in magnitude
B)	A thin shell of radius $\frac{5a}{2}$ and having a charge Q uniformly distributed over its surface and a point charge Q placed at its centre as shown.	Q)	$\frac{3}{20\pi {\in }_0}\frac{Q^2}{a}$  in magnitude
C)	A solid sphere of radius a and having a charge Q uniformly distributed throughout its volume as shown.	R)	$\frac{2}{5\pi {\in }_0}\frac{Q^2}{a}$  in magnitude
D)	A solid sphere of radius a and having a charge Q uniformly distributed throughout its volume. The solid sphere is surrounded by a concentric thin uniformly charged spherical shell of radius 2a and carrying charge Q as shown	S)	Positive in sign