Consider the half-cell reduction reaction
$$\begin{gathered} {\mathrm{Mn}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Mn}, \mathrm{E}°=-1.18 \mathrm{V} \\ {\mathrm{Mn}}^{2+}\to {\mathrm{Mn}}^{3+}+{\mathrm{e}}^{-}, \mathrm{E}°=-1.51 \mathrm{V} \end{gathered}$$

The E° for the reaction $3{\mathrm{Mn}}^{2+}\to {\mathrm{Mn}}^0+2{\mathrm{Mn}}^{3+}$ and possibility of the forward reaction are respectively
(a) –4.18 V and yes              (b) +0.33 V and yes
(c) +2.69 V and no               (d) –2.69 V and no