In which of the following pairs

$\mathrm{H}_{2}^{+}, \mathrm{He}_{2}^{2-}$

$\mathrm{H}_{2}^{-}, \mathrm{He}_{2}^{2-}$

$\mathrm{H}_{2}^{2+}, \mathrm{He}_{2}$

$\mathrm{H}_{2}^{-}, \mathrm{He}_{2}^{2+}$