At $298\;K$ the standard reduction potential are $1.51\;V$ for $MnO_4^{-} |Mn^{2+}, 1.36\;V$ for $Cl_2|Cl^{-}, 1.07\;V$ for $Br_2|Br^{-}$, and $0.54\;V$ for $I_2|I^{-}.$ At $pH=3$ permanganate is expected to oxidize$\bigg( \large\frac{RT}{F} $$=0.059\;V\bigg)$

Question

$\begin{array}{1 1} Cl^{-},Br^{-}\;and\;I^{-} \\ Cl^{-},Br^{-} \\ Br^{-}\;and\;I^{-} \\ I^{-}\;only \end{array} $