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Fe^(3+) is reduced to Fe^(3+) by sing...

`Fe^(3+)` is reduced to `Fe^(3+)` by sing

A

`H_(2)O_(2)` in presence of `NaOH`

B

`Na_(2)O_(2)` in water

C

`H_(2)O_(2)` in presence of `H_(2)SO_(4)`

D

`Na_(2)O_(2)` in presence of `H_(2)SO_(4)`

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