`H_(2)O_(2)` would have as oxidant with respect to how many of the following couples at standard condition?
(a) `I_(2)//I^(-)`
(b) `S_(2)O_(8)^(2-)//SO_(4)^(2-)`
(C _ `Fe^(3+) // Fe^(2+)`
[Given:
`E_(O_(2),H^(+)|H_(2)O_(2))^(@)`= +0.69V, `E_(H_(2)O_(2),H^(+)|H_(2)O)^(@) =+1.77V`
`E_(I_(2)|I^(-))^(@) = 0.535 V`, `E_(S_(2)O_(8)^(2-)|SO_(4)^(2-) = 2.0`V
`E_(Fe^(3+)|Fe^(2+))^(@)=0.77V`

Answer

2