For the given aqueous reactions, which of the statements(s) is ( are) true ? Excess
`KI+K_(3)[Fe(CN)_(6)]overset("dilute"H_(3)SO_(4))(rarr)` brownish yellow solution `overset(ZnSO_(4))(rarr) white ppt + brownish yellow fil trate overset(Na_(2)S_(2)O_(3))(rarr)` colourless solution`
A. The first reaction is a redox reaction
B. White precipitate is `Zn_(3)[Fe(CN)_96)]_(2)`
C. Addition of filtrate to starch solution given blue coloure
D. White precipitate is soluble in NaOH solution