Which one of the following reactions represents the oxidizing property of H₂O₂ ?

⇒

In the above reaction H₂O₂ reduces the Mn⁺⁷ to Mn⁺² there H₂O₂ acts as reducing agent.
⇒ 

In the above reaction H₂O₂ acts as a reducing agent since it reducing agent Fe⁺³ [ferric] to Fe⁺² [ferrous].
⇒

In the above reaction H₂O₂ acts as a reducing agent since it reducing agent Pb⁺⁴  to Pb⁺²
⇒

In the above reaction H₂O₂ acts as  oxidising agent,since it oxidises the   ${\mathrm{I}}^{-1} \mathrm{to} {\mathrm{I}}_2$