Which of the following is not characteristic of HF

a) HF has a large electronegativity difference between its two atoms.
b) HF is almost ionic in its bonding.
c) HF is very polarized.
d) HF involves just atomic orbitals because the hydrogen atom just has one valence electron.

HF involves just atomic orbitals because the hydrogen atom just has one valence electron.

It involves molecular orbitals