Statement-I: Oxidizing power of ${\mathrm{VO}}_2^{+}<{\mathrm{Cr}}_2{\mathrm{O}}_7^{-2}<{\mathrm{MnO}}_4^{-}$
Statement-II: Stability of V⁺³<Cr⁺³< Mn⁺² formed by the reductions of ${\mathrm{VO}}_2^{+},{\mathrm{Cr}}_2{\mathrm{O}}_7^{-2}\mathrm{and}{\mathrm{MnO}}_4^{-}$

Oxidizing power order:  ${\mathrm{VO}}_2^{+}<{\mathrm{Cr}}_2{\mathrm{O}}_7^{-2}<{\mathrm{MnO}}_4^{-}$ 

Stability order:               ${\mathrm{VO}}_2^{+}>{\mathrm{Cr}}_2{\mathrm{O}}_7^{-2}>{\mathrm{MnO}}_4^{-}$

In transition elements while moving from left to right lower oxidation state stability increases. Hence, their oxidizing ability increases and easily converted into lower oxidation states.