Which of the following is a set of reducing agents?

(1) In HNO3, 'N' is in +5 state (its highest Ox.state)HNO3 never can act like reducing agent (2) In MnO4- 'Mn' is in +7 state (its higest OX.state)MnO4- cannot act like reducing agent(3) I- →I2 (or) IO3- is possible    Fe+2 →Fe+3 is possible    Na → Na+ is possibleAll the species in option (3) equation act like reducing agent(4) In Cr2O72- and CrO4-2 , 'Cr' is in +6 state (its highest Ox.state)Cr2O7-2 and CrO4-2 can't act like reducing agents