Sodium fusion extract, obtained from aniline, on treatment with iron (II) sulphate and `H_(2)SO_(4)` in presence of air gives a

Sodium fusion extract, obtained from aniline, on treatment with iron (II) sulphate and `H_(2)SO_(4)` in presence of air gives a prussian blue precipitate. Hence, the blue colour is due to the formation of
A. `Fe_(4)[Fe(CN)_(6)]_(3)`
B. `Fe_(3)[Fe(CN)_(6)]_(2)`
C. `Fe_(4)[Fe(CN)_(6)]_(2)`
D. `Fe_(3)[Fe(CN)_(6)]_(3)`

Sodium fusion extract, obtained from aniline, on treatment with iron (II) sulphate and `H_(2)SO_(4)` in presence of air gives a prussian blue precipit

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