Out of `Cu^(2+),Ni^(2+),Co^(2+)` and `Mn^(2+)` of those that dissolve in dil HCI only one give precipitate when `H_(2)S` is passed. Identify the corresponding order which do not give precipitation :
A. `Ni^(2+)`
B. `Cu^(2+)`
C. `Co^(2+)`
D. `Mn^(2+)`