The correct order of \( E_{\mathrm{M}^{2+} / \mathrm{M}}^{\circ} \) values with negative sign fo...

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The correct order of \( E_{\mathrm{M}^{2+} / \mathrm{M}}^{\circ} \) values with negative sign for the four successive elements \( \mathrm{Cr}, \mathrm{Mn}, \mathrm{Fe} \) and \( \mathrm{Co} \) is
(a) \( \mathrm{Mn}\mathrm{Cr}\mathrm{Fe}\mathrm{Co} \)
(b) \( \mathrm{Cr}\mathrm{Fe}\mathrm{Mn}\mathrm{Co} \)
(c) \( \mathrm{Fe}\mathrm{Mn}\mathrm{Cr}\mathrm{Co} \)
(d) \( \mathrm{Cr}\mathrm{Mn}\mathrm{Fe}\mathrm{Co} \)
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