Passing $$H_2S$$ gasinto a mixture of $$Mn^{2+}, Ni^{2+}, Cu^{2+}$$ and $$Hg^{2+}$$ ions in an acidified aqueous solution precipitates

A

CuS and HgS

B

MnS and CuS

C

MnS and NiS

D

NiS and HgS