Column-I (Basic radicals)		Column-II (Observations related to the basic radicals given in the column I)		Column-III (Observations related to the basic radical given in the column I)
A)	$P{b}^{+2},H{g}^{+2}$	P)	Both produces precipitate with $H_{2}S$ in acidic medium	I	Both produce precipitate with KCN solution
B)	$C{u}^{+2},Z{n}^{+2}$	Q)	Only one produce precipitate with $H_{2}S$ in acidic medium	II	Both produce precipitate with $K_4\left[Fe{\left(CN\right)}_6\right]$  solution
C)	$A{g}^{+},C{u}^{+2}$	R)	Only one produce precipitate with dilute HCl	III	Both produce precipitate with KI solution
D)	$P{b}^{+2},A{l}^{+3}$	S)	Both produce precipitate with excess NaOH solution	IV	Both sulphides are soluble in conc nitric acid