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In the Lassaigne's test, prussian blue c...

In the Lassaigne's test, prussian blue colour is obtained due to formation of
(1) `Na_(4)[Fe(CN)_(6)]`
(2) `Fe_(4)[Fe(CN)_(6)]_(3)`
(3) `Fe_(2)[Fe(CN)_(6)]`
(4) `Fe_(3)[Fe(CN)_(6)]_(4)`

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Verified by Experts

The correct Answer is:
2
The prussian blue colour is due to the formation of `Fe_(4)[Fe(CN)_(6)]_(3)`.
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