Which acts as a reducing agent ?

1.	Which acts as a reducing agent ?
Answer» `HNO_3` `KMnO_4` `H_2SO_4` ` (COOH)_2` SOLUTION :`Hoverset(N)O_3,overset(+7)(KMnO_4),overset(+6)(H_2SO_4)` ELEMENT it its HIGHEST O.S acts as O.A `{:(COOH),(\|),(COOH):},2x-8+2=0,x=+3`

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