In which of the following molecules/species all following characteristics are found?

Tetrahedral hybridization

Hybridization can be considered to have taken place with the help of empty orbital(s).

All bond lengths are identical. i.e.. all A-B bond lengths are identical.

All of the following traits are present in ${\mathrm{BF}}_4^{-}$ ions.

(A) Tetrahedral hybridization, which is ${\mathrm{sp}}^3$ hybridization since it has four bond pairs of electrons but no lone pairs.

(b) The use of an empty orbital can be regarded evidence of hybridization. B has three valence electrons, while the hybridization involves four orbital. Thus, the hybridization involves one vacant orbital.

(c) All bond lengths are the same; for example, there are four identical BF single bonds, so all AB bond lengths are the same.

Hence, the correct option is D.