Sodium fusion extract, obtained from aniline, a treatment with iron (II) sulphate and H_(2)SO_(4) in presence of air gives a prussion blue precipitate. The blue colour is due to the formation of:

Sodium fusion extract, obtained from aniline, a treatment with iron (I

1.	Sodium fusion extract, obtained from aniline, a treatment with iron (II) sulphate and H_(2)SO_(4) in presence of air gives a prussion blue precipitate. The blue colour is due to the formation of:
Answer» `Fe_(4)[FE(CN)_(6)]_(3)` `Fe_(3)[Fe(CN)_(6)]_(2)` `Fe_(4)[Fe(CN)_(6)]_(2)` `Fe_(3)[Fe(CN)_(6)]_(3)` Answer :A