Given $E^{\circ} _{Cl_2/Cl^{-}} =1.36 \;V, E^{\circ} _{Cr^{3+}/Cr} =-0.74\;V \\ E^{\circ} _{Cr_2O_7^{2-}} =1.33 \;V, E^{\circ} _{MnO_4^{-}/Mn^{2+}} =1.51 \;V$ Among the following, the strongest reducing agent is :

Question

$\begin{array}{1 1} (1) Cr^{3+} \\ (2) Cl^{-} \\ (3) Cr \\ (4) Mn^{2+} \end{array}$