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Which of the following complex formation...

Which of the following complex formation indicates presence of sulphur in the organic compound .When sodium nitroprusside is added to sodium extract of the compound

A

`Fe_(4)[Fe(CN)_(6)]_(3)`

B

`Na_(2)[Fe(NO)(CN)_(5)]`

C

`Fe_(4)(CNS)_(3)`

D

`Na_(4)[Fe(CN)_(5)NOS]`

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