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On the basis of the following \( \mathrm{E}^{\circ} \) values, the strongest oxidizing agent is:
\( \begin{array}{ll} {\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-} \rightarrow\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}+\mathrm{e}^{-1}} \\ \mathrm{Fe}^{2+} \rightarrow \mathrm{Fe}^{3+}+\mathrm{e}^{-1}, & \mathrm{E}^{\circ}=-0.35 \mathrm{~V} \\ & \mathrm{E}^{\circ}, 77 \mathrm{~V} \end{array} \)
(A) \( \mathrm{Fe}^{3+} \)
(B) \( \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-} \)
(C) \( \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-} \)
(D) \( \mathrm{Fe}^{2+} \)
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