In which reaction(s) blood red colouration is observed in product:

1.	In which reaction(s) blood red colouration is observed in product:
Answer» `FeSO_(4) overset(H_(2)O_(2))underset(H^(+))RARR.... overset(KCN)rarr` Product `Na_(2)S_(2)O_(3) overset(KCN)rarr .....overset(FE^(3+))rarr` Product `NH_(4)SCNoverset("Ferric")underset("alum")rarr` Product `NO_(2)^(-) overset("Thiourea")rarr....overset(Fe^(3+))rarr` Product Answer :A::B::C::D

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