Which one of the following has the regular tetrahedral structure?

The sp³ hybridization of the element boron has four bond pairs and no lone pairs. The geometry of ${\mathrm{BF}}_4^{-}$ is a regular tetrahedron. There is sp³d hybridization in SF₄. There is sp³d² hybridization in XeF₄. [Ni(CN)₄]^-2 undergoes dsp² hybridization.