Which of the following statement is incorrect.
A. `Cu^(2+)` on reaction with `K_(4)[Fe(CN)_(6)]` gives a chocolate brown ppt.
B. `Fe^(3+)` on reaction with `K_(4)[Fe(CN)_(6)]` gives a blue ppt.
C. `Ag^(+)` on reaction with `K_(4)[Fe(CN)_(6)]` gives a orange ppt.
D. Potassium hexacyanoferrate (II) complex is diamagnetic.
