When excess of dilute `NH_(4)OH` is added to an aqueous solution of copper sulphate an intense blue colour is developed.This is

When excess of dilute `NH_(4)OH` is added to an aqueous solution of copper sulphate an intense blue colour is developed.This is due to the formation of:
A. `[Cu(NH_(3))_(6)]^(2+)`
B. `Cu(OH)_(2)`
C. `[Cu(NH_(3))_(4)]^(2+)`
D. `(NH_(4))_(2)SO_(4)`

When excess of dilute `NH_(4)OH` is added to an aqueous solution of copper sulphate an intense blue colour is developed.This is due to the formation o

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