The standard reduction potentials at \[298\,K\]for the following half reactions are given against each \[Z{{n}^{2+}}(aq.)+2e\]⇌\[Zn(s)\]; ? 0.762 \[C{{r}^{3+}}(aq)+3e\]⇌\[Cr(s)\]; ? 0.740 \[2{{H}^{+}}(aq)+2e\]⇌\[{{H}_{2}}(g)\]; 0.00 \[F{{e}^{3+}}(aq)+e\]⇌\[F{{e}^{2+}}(aq)\]; 0.770 Which is the strongest reducing agent [IIT 1981; MP PET/PMT 1988; MP PMT 1989; MH CET 2001]

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