The pair(s) of ions where both the ions are precipitated upon passing $H_{2}S$ gas in presence of dilute $HCl$, is/are:

The correct option is D $H{g}^{2+},B{i}^{3+}$
Group $2$ cations will be precipitated as sulphides when treated with $H_{2}S$ gas in presence of dilute $HCl$.
$C{u}^{2+}+H_{2}S\stackrel{H^{+}}{\to }CuS\downarrow$
$P{b}^{2+}+H_{2}S\stackrel{H^{+}}{\to }PbS\downarrow$
$H{g}^{2+}+H_{2}S\stackrel{H^{+}}{\to }HgS\downarrow$
$2B{i}^{2+}+3H_{2}S\stackrel{H^{+}}{\to }B{i}_2{S}_3\downarrow$