Redox Reactions

Observe the following reaction,

\(\mathrm{Cl}_2(g)+2 \mathrm{OH}^{-}(a q) \longrightarrow \mathrm{ClO}^{-}(a q)+\mathrm{Cl}^{-}(a q)+\mathrm{H}_2 \mathrm{O}(l)\)

Identify the correct statements about this reaction,

[I.] $\mathrm{Cl}_2(g)$ is oxidised to $\mathrm{ClO}^{-}(a q)$.

[II.] $\mathrm{Cl}_2(g)$ is oxidised to $\mathrm{Cl}^{-}(a q)$.

[III.] $\mathrm{Cl}_2(g)$ is reduced to $\mathrm{ClO}^{-}(a q)$.

[IV.] $\mathrm{Cl}_2(g)$ is reduced to $\mathrm{Cl}^{-}(a q)$.

The correct answer is