For the reaction, ${\mathrm{M}}^{\mathrm{n}+}\left(\mathrm{aq}\right)+{\mathrm{ne}}^{-}\to \mathrm{M}\left(\mathrm{s}\right)$, select the best suitable representation of Nernst equation, when the solid M is taken.

Electrode potential of an electrode is measured with respect to standard hydrogen electrode by the expression
${\mathrm{E}}_{{\mathrm{M}}^{\mathrm{n}+}/\mathrm{M}}={\mathrm{E}}_{{\mathrm{M}}^{\mathrm{n}+}/\mathrm{M}}^{\mathrm{o}}-\frac{\mathrm{RT}}{\mathrm{nF}}\mathrm{In} \frac{\left[\mathrm{M}\right]}{\left[{\mathrm{M}}^{\mathrm{n}+}\right]}$
but concentration of solid M is taken as unity 
So,           ${\mathrm{E}}_{{\mathrm{M}}^{\mathrm{n}+}/\mathrm{M}}={\mathrm{E}}_{{\mathrm{M}}^{\mathrm{n}+}/\mathrm{M}}^{\mathrm{o}}-\frac{\mathrm{RT}}{\mathrm{nF}}\mathrm{In} \frac{1}{\left[{\mathrm{M}}^{\mathrm{n}+}\right]}$