Out of `Cr^(2+),Ni^(2+),Co^(2+) and Mn^(2+)` those dissolve in dil. HCl, only one gives a precipitate when `H_(2)S` is passed. I

Out of `Cr^(2+),Ni^(2+),Co^(2+) and Mn^(2+)` those dissolve in dil. HCl, only one gives a precipitate when `H_(2)S` is passed. Identify the corresponding one
A. `Ni^(2+)`
B. `Cu^(2+)`
C. `Co^(2+)`
D. `Mn^(2+)`

Out of `Cr^(2+),Ni^(2+),Co^(2+) and Mn^(2+)` those dissolve in dil. HCl, only one gives a precipitate when `H_(2)S` is passed. Identify the correspond

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