The variation of equivalent conductance of a strong electrolyte with ${\left(\mathrm{concentration}\right)}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}$ is represented by

$2{\mathrm{X}}^{-}+{\mathrm{Y}}_2\to 2{\mathrm{Y}}^{-}+{\mathrm{X}}_2$

$2{\mathrm{W}}^{-}+{\mathrm{Y}}_2\to$ no reaction

$2{\mathrm{Z}}^{-}+{\mathrm{X}}_2\to 2{\mathrm{X}}^{-}+{\mathrm{Z}}_2$

Which of the following statement is correct? 

$\mathrm{E}°$ here represents standard oxidation potential.