${\mathrm{KMnO}}_4+{\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3+{\mathrm{H}}^{+}\to {\mathrm{Mn}}^{2+}+{\mathrm{SO}}_4^{2-}+{\mathrm{K}}^{+}$.
Which of the following is false for the given equation after balancing

equivalent weight of ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3$ in this equation is  $\frac{\mathrm{M}.\mathrm{wt}}{8}$

5/8 moles of ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3$ is oxidize by one mole of  ${\mathrm{KMnO}}_4$

Change in medium from acidic to basic will change the stoichiometry of equation

equivalent weight of ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3$ in this reaction  is $\frac{\mathrm{M}.\mathrm{wt}}{2}$