(C) Ozone $(O_3)$ acts as a strong oxidizing agent. In $KMnO_4$,the oxidation state of Manganese $(Mn)$ is $+7$,which is its maximum possible oxidatio

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(C) Ozone $(O_3)$ acts as a strong oxidizing agent. In $KMnO_4$,the oxidation state of Manganese $(Mn)$ is $+7$,which is its maximum possible oxidation state. Therefore,$Mn$ cannot be oxidized further. In contrast,$KI$ ($I^-$ to $I_2$),$FeSO_4$ ($Fe^{2+}$ to $Fe^{3+}$),and $K_2MnO_4$ ($Mn^{6+}$ to $Mn^{7+}$) can all be oxidized by $O_3$.