The standard potential at 298 K for the following half reactions are given against each: \[Z{{n}^{2+}}(aq)+2{{e}^{-}}\rightleftharpoons Zn(s)\] \[-\,0.762\text{ }V\] \[2{{H}^{+}}(aq)+2{{e}^{-}}\rightleftharpoons {{H}_{2}}(g)\] 0.000 V \[C{{r}^{3+}}(aq)+3{{e}^{-}}\rightleftharpoons Cr(s)\] \[-\,0.740\text{ }V\] \[F{{e}^{3+}}(aq)+2{{e}^{-}}\rightleftharpoons F{{e}^{2+}}(aq)\] 0.770 V Which is the strongest reducing agent?

• A. Zn(s)                
• B. Cr(s)
• C. \[{{H}_{2}}\left( g \right)\]         
• D. \[F{{e}^{2+}}\left( aq \right)\]