Chemistry

Problem

Match list-I with list-II

	List-I<br>(Cation)		List-II<br>(Group reagent)
a.	$Al^{3+}$	(i)	$H_2S$ in presence of $NH_4OH$
b.	$Ni^{2+}$	(ii)	$H_2S$ gas in presence of dilute $HCl$
c.	$Ba^{2+}$	(iii)	$(NH_4)_2CO_3$ in presence of $NH_4OH$
d.	$As^{3+}$	(iv)	$NH_4OH$ in presence of $NH_4Cl$

The correct match is