Given : <br> $E^{\circ}_{Cl_2/Cl^-} = 136 \; V, \; \; \; E^{\circ}_{Cr^{3+} / Cr} = -0.74 \; V$ <br> $E^{\circ}_{Cr_2O_7^{2-}/Cr^{3+}} = 1.33\; V, \; \; \; E^{\circ}_{MnO_4^- / Mn^{2+}} = 1.51 \; V$ <br> Among the following, the strongest reducing agent is :

Question

( A ) $Cr$
( B ) $Cr^{3+}$
( C ) $Cl^-$
( D ) $Mn^{2+}$