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For the reduction of \( \mathrm{NO}_{3}^{-} \)ion in an aqueous solution, \( \mathrm{E}^{0} \) is \( +0.96 \mathrm{~V} \). Values of \( \mathrm{E}^{0} \) for some metal ions are given below
\[
\begin{array}{ll}
\mathrm{V}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightarrow \mathrm{V} & \mathrm{E}^{\mathrm{o}}=-1.19 \mathrm{~V} \\
\mathrm{Fe}^{3+}(\mathrm{aq})+3 \mathrm{e}^{-} \rightarrow \mathrm{Fe} & \mathrm{E}^{\mathrm{o}}=-0.04 \mathrm{~V} \\
\mathrm{Au}^{3+}(\mathrm{aq})+3 \mathrm{e}^{-} \rightarrow \mathrm{Au} & \mathrm{E}^{\mathrm{o}}=+1.40 \mathrm{~V} \\
\mathrm{Hg}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightarrow \mathrm{Hg} & \mathrm{E}^{\mathrm{o}}=+0.86 \mathrm{~V}
\end{array}
\]
The pair(s) of metals that is(are) oxidized by \( \mathrm{NO}_{3}^{-} \)in aqueous solution is(are)
(a) \( \mathrm{V} \) and \( \mathrm{Hg} \)
(b) \( \mathrm{Hg} \) and \( \mathrm{Fe} \)
(c) Fe and \( \mathrm{Au} \)
(d) Fe and V
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