For a Galvanic cell consisting zinc electrode and standard hydrogen electrode, \(\mathrm{E}^{\circ}\left(\mathrm{Zn}_{(\mathrm{aq})}^{+2} \mid \mathrm{Zn}_{(\mathrm{s})}\right)=0.76 \mathrm{~V}\). Identify the reaction that takes place at positive electrode during working of cell?

1. A \(\mathrm{Zn}_{(\mathrm{s})} \longrightarrow \mathrm{Zn}^{+2}{ }_{(\mathrm{aq})}+2 \mathrm{e}^{-}\)
2. B \(\mathrm{Zn}^{+2}{ }_{(\mathrm{aq})}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Zn}_{(\mathrm{s})}\)
3. C \(\mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{H}_{(\mathrm{g})}^{+}+2 \mathrm{e}^{-}\)
4. D \(2 \mathrm{H}^{+}{ }_{(\mathrm{aq})}+2 \mathrm{e}^{-} \longrightarrow \mathrm{H}_{2(\mathrm{~g})}\)