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Write the correct formula of the following complex-
\( \mathrm{P} \)
[Iron (III) hexacyanidoferrate (II)-
W
tetradecahydrate]
(1) \( \mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3} \)
(2) \( \mathrm{Fe}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{2} \)
(3) \( \mathrm{Fe}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{2} .4 \mathrm{H}_{2} \mathrm{O} \)
(4) \( \mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3} \cdot 14 \mathrm{H}_{2} \mathrm{O} \)
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