For the cell \(Zn(s)|\,Z{n^{2 + }}(aq)\,||\,{M^x+} \,(aq)|\,M(s),\) different half cells and their standard electrode potentials are given below

\(M^{x+}\,  (aq)\,/M(s)\)	\(A{u^{3 + }}(aq)/\) \(Au(s)\)	\(A{g^ + }(aq)/\) \(Ag(s)\)	\(F{e^{3 + }}(aq)/\) \(F{e^{2 + }}(aq)\)	\(F{e^{2 + }}(aq)/\) \(Fe(s)\)
\(E^o\,M^{x+}\) \(\,/M(V)\)	\(1.40\)	\(0.80\)	\(0.77\)	\(-0.44\)

If \(E_{Z{n^{2 + }}/Zn}^o =  - 0.76\,V,\) which cathode will given a maximum value of  \(E_{cell}^o\) per electron transferred?

1. A \(Ag^+\,/\,Ag\)
2. B \(Fe^{3+}\,/\,Fe^{2+}\)
3. C \(Au^{3+}\,/\,Au\)
4. D \(Fe^{2+}\,/\,Fe\)