The blue complex ion formad on addition of conc. `NH_4OH `solution to a `Cu^(2+)` salt solution is :

Options

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

Answer

C