Passing $$\mathrm{H_2S}$$ gas into a mixture of $$\mathrm{Mn^{2+}}$$, $$\mathrm{Ni^{2+}}$$, $$\mathrm{Cu^{2+}}$$ and $$\mathrm{Hg^{2+}}$$ in an acidified aqueous solution precipitates

A

$$\mathrm{CuS}$$ and $$\mathrm{HgS}$$

B

$$\mathrm{MnS}$$ and $$\mathrm{CuS}$$

C

$$\mathrm{MnS}$$ and $$\mathrm{NiS}$$

D

$$\mathrm{NiS}$$ and $$\mathrm{HgS}$$