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Among $Ni(CO)_4,\, Ni(CN)_4^{2-}$ and $[Ni(Cl)_4]^{2-}$

• A
  $Ni(CO)_4$ and $NiCl_4^{2-}$ are diamagnetic and $Ni(CN)_4^{2-}$ is paramagnetic
• B
  $NiCl_4^{2-}$ and $Ni(CN)_4^{2-}$ are diamagnetic and $Ni(CO)_4$ is paramagnetic
• ✓
  $Ni(CO)_4$ and $Ni(CN)_4^{2-}$ are diamagnetic and $NiCl_4^{2-}$ is paramagnetic
• D
  $Ni(CO_4)$ is diamagnetic and $NiCl_4^{2-}$ and $Ni(CN)_4^{2-}$ are paramagnetic