In each situation of column-I, some charge distributions are given with all details explained. The electrostatic potential energy and its nature is given situation in column -II. Match the proper entries from column-II to column-I using the codes given below the columns, Column-I Column-II (P) A thin shell of radius a and having a charge −Q uniformly distributed over its surface as shown (1) 18πϵ0Q2a in magnitude (Q) A thin shell of radius 5a2 and having a charge −Q uniformly distributed over its surface and a point charge −Q is brought from infinity and placed at its centre as shown. (2) 320πϵ0Q2a in magnitude (R) A solid sphere of radius a and having a charge −Q uniformly distributed throughout its volume as shown. (3) 27Q80πϵ0Q2a in magnitude (S) 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 (4) 527πϵ0Q2a in magnitude