In which of the following molecules/ions are all the bonds not equal?

- ${\text{SiF}}_4$: Tetrahedral geometry ($s{p}^3$). All $4$ bonds equal.${\text{XeF}}_4$: Square planar geometry ($s{p}^3{d}^2$ with $2$ lone pairs). All $4$ bonds equal.${\text{BF}}_4^{-}$: Tetrahedral geometry ($s{p}^3$). All $4$ bonds equal.${\text{SF}}_4$: See-saw geometry ($s{p}^{3}d$ with $1$ lone pair). It has two types of bonds: axial and equatorial. Due to different repulsion environments, axial and equatorial bond lengths are not equal.