When `NH_4OH` is added to copper sulphate solution, blue colour is obtained due to formation of

Options

A. `[Cu(NH_(3))_(2)]^(2+)`
B. `Cu(OH)_(2)`
C. `[Cu(NH_(3))_(2)]^(2+)`
D. `(NH_(4))_(2)SO_(4)`

Answer

3

Explanation

`Cu^(2+)+4NH_(4)OHrarr[Cu(NH_(3))_(4)]^(2+)+4H_(2)O`