For the redox reaction

${\mathrm{MnO}}_4^{-} + {\mathrm{C}}_2{\mathrm{O}}_4^{2-} +{\mathrm{H}}^{+}\to {\mathrm{Mn}}^{2+} + {\mathrm{CO}}_2 + {\mathrm{H}}_2\mathrm{O}$

the correct coefficients of the reactants for the balanced reaction are

${\mathrm{MnO}}_4^{-} {\mathrm{C}}_2{\mathrm{O}}_4^{2-} {\mathrm{H}}^{+}$

2                       5              16

${\mathrm{MnO}}_4^{-} {\mathrm{C}}_2{\mathrm{O}}_4^{2-} {\mathrm{H}}^{+}$

16                     5              2

${\mathrm{MnO}}_4^{-} {\mathrm{C}}_2{\mathrm{O}}_4^{2-} {\mathrm{H}}^{+}$

5                      16              2

${\mathrm{MnO}}_4^{-} {\mathrm{C}}_2{\mathrm{O}}_4^{2-} {\mathrm{H}}^{+}$

2                      16              5