Which one of the following compounds

$\left[\mathrm{GeCl}_{6}\right]^{2-}$

$\left[\mathrm{Sn}(\mathrm{OH})_{6}\right]^{2-}$

$\left[\mathrm{SiCl}_{6}\right]^{2-}$

$\left[\mathrm{SiF}_{6}\right]^{2-}$