A solution contains `Cu(CH_3COO)_2`. ` Cd(CH_3COO)_2 and Zn(CH_3COO)_2`. On passing `H_2S` gas , there is precipitation of sulphide of :

Options

A. `Zn^(2+) , Cd^(2+) `
B. `Cu^(2+), Cd^(2+) `
C. `Zn^(2+), Cu^(2+) `
D. `Zn^(2+), Cu^(2+) , Cd^(2+)` .

Answer

D