Hybridization of central metal in the complexes, $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right], {\left[{\mathrm{NiCl}}_4\right]}^{-2} \mathrm{and} {\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{-2}$respectively 

• A

  ${\mathrm{dsp}}^2, {\mathrm{sp}}^3, {\mathrm{sp}}^3$

• B

  ${\mathrm{sp}}^3, {\mathrm{sp}}^3, {\mathrm{dsp}}^2$

• C

  ${\mathrm{dsp}}^2, {\mathrm{sp}}^3, {\mathrm{dsp}}^2$

• D

  ${\mathrm{sp}}^3, {\mathrm{dsp}}^2, {\mathrm{sp}}^3$