$[Cu(NH_3)_4]^{2+}$ shows the following hybridization:

Which of the following statements is incorrect?

Match the coordination number and type of hybridisation with distribution of hybrid orbitals in space based on Valence bond theory.

Coordination number and type of hybridisation	Distribution of hybrid orbitals in space
$(a)$. $4, sp^3$	$(i)$. trigonal bipyramidal
$(b)$. $3, sp^2$	$(ii)$. octahedral
$(c)$. $5, sp^3 d$	$(iii)$. tetrahedral
$(d)$. $6, sp^3 d^2$	$(iv)$. trigonal planar

Select the correct option $:$

Which of the following ions forms complexes with a coordination number of only $4$?

The geometry of $[Ni(CO)_4]$ and $[NiCl_2(PPh_3)_2]$ are

Which of the following statements is correct for the complexes $Ni(CO)_4$ and $[Ni(CN)_4]^{2-}$?