From the magnetic behaviour of ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ (paramagnetic) and $\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$ (diamagnetic), choose the correct geometry and oxidation state.

${\left[{\mathrm{NiCl}}_4\right]}^{2-}$: Ni^II, tetrahedral
$\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$: Ni(0), tetrahedral

${\left[{\mathrm{NiCl}}_4\right]}^{2-}$: Ni^II, tetrahedral
$\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$: Ni^II, square planar

${\left[{\mathrm{NiCl}}_4\right]}^{2-}$: Ni(0), tetrahedral
$\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$: Ni(0), square planar

${\left[{\mathrm{NiCl}}_4\right]}^{2-}$: Ni^II , square planar
$\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$: Ni(0), square planar