(A) The central atom in the complex Ni(CO)4 undergoes sp3 hybridization.
(B) The central atom in the complex [Ni(CN)4]2− undergoes dsp3 hybridization.
(C) The central atom in the complex [Fe(CN)6]4− undergoes d2sp3 hybridization.
(D) The central atom in the complex [MnF6]4−undergoes sp3d2 hybridization.