In which of the following reactions, `H_(2)O_(2)` act as a reducing agent ?

Options

A. `PbO_(2)(s)+H_(2)O_(2)(aq) to PbO(s)+H_(2)O(l)+O_(2)(g)`
B. `Na_(2)SO_(3)(aq)+H_(2)O_(2)(aq) to Na_(2)SO_(4)(aq)+H_(2)O(l)`
C. `2KI(aq)+H_(2)O_(2)(aq) to 2KOH(aq)+I_(2)(s)`
D. All the above