The correct statement among the following is:

$\displaystyle \mathrm{Ni}(\mathrm{CO})_4$ is diamagnetic and $\displaystyle \left[\mathrm{NiCl}_4\right]^{2-}$ and $\displaystyle \left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ are paramagnetic.

$\displaystyle \left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ and $\displaystyle \left[\mathrm{NiCl}_4\right]^{2-}$ are diamagnetic and $\displaystyle \mathrm{Ni}(\mathrm{CO})_4$ is paramagnetic.

$\displaystyle \mathrm{Ni}(\mathrm{CO})_4$ and $\displaystyle \left[\mathrm{NiCl}_4\right]^{2-}$ are diamagnetic and $\displaystyle \left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is paramagnetic.

$\displaystyle \mathrm{Ni}(\mathrm{CO})_4$ and $\displaystyle \left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ are diamagnetic and $\displaystyle \left[\mathrm{NiCl}_4\right]^{2-}$ is paramagnetic.