Which of the following are tetrahedral structure?

The correct option is C $Ni\left(CO{)}_4\right]$
In the case of $\left[Ni\right(CO{)}_4]$ the Ni is not charged and hence the configuration is $3d^{8}4s^2$, Now since CO is a strong ligand hence the pairing of electrons take place and Therefore the configuration changes to $3d^{10}4s^0$ following this the CO donates its electrons to 4s and 4p subshell and hence the hybridization of $\left[Ni\right(CO{)}_4]$ is $s{p}^3$ and the geometry is tetrahedral.