The type of hybridisation involved in the metal ion of [Ni(H2O)6]^2+ complex is ?

The type of hybridisation involved in the metal ion of [Ni(H2O)6]2+ complex is ?  (A) d3sp2 (B) sp3d2 (C) sp3 (D) dsp2

The type of hybridisation involved in the metal ion of [Ni(H 2 O) 6 ] 2+ complex is  sp 3 d 2 .