Using the data given below find out the strongest reducing agent.
               $\begin{array}{l}{\mathrm{E}}^{\ominus }{\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}/{\mathrm{Cr}}^{3+}=133\mathrm{V};{\mathrm{E}}^{\ominus }{\mathrm{Cl}}_2/{\mathrm{Cl}}^{-}=1.36\mathrm{V}\\ {\mathrm{E}}^{\ominus }{\mathrm{MnO}}_4^{-}/{\mathrm{Mn}}^{2+}=1.51\mathrm{V};{\mathrm{E}}^{\ominus }{\mathrm{Cr}}^{3+}/\mathrm{Cr}=-0.74\mathrm{V}\end{array}$

• A

  Cl^-

• B

  Cr

• C

  Cr³⁺

• D

  Mn²⁺