Which of the following is correct about the isoelectronic species,...

Which of the following is correct about the isoelectronic species, $\mathrm{Li}^{+}$and $\mathrm{H}^{-}$? I. $\mathrm{H}^{-}$is larger in size than $\mathrm{Li}^{+}$ II. $\mathrm{Li}^{+}$is a better reducing agent than $\mathrm{H}^{-}$ III. It requires more energy to remove an electron from $\mathrm{H}^{-}$than from $\mathrm{Li}^{+}$ IV. The chemical properties of the two ions are the same