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A light greenish coloured salt was solub...

A light greenish coloured salt was soluble in water ion passing `H_(2)S` into the slution a black ppt was obtained which dissolves readily in HCl. The metal on present is

A

`CO^(+2)`

B

`Fe^(+2)`

C

`Ni^(+2)`

D

`Mn^(+2)`

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