`AlCl_(3)` is an electron-deficient compound but `AlF_(3)` is not, due to
A. Atomic size of `F` is smaller than `Cl`, which makes `AlF_(3)` more covalent.
B. `AlCl_(3)` is a covalent compound compound while `AlF_(3)` is an ionic compound.
C. `Al` in `AlCl_(3)` is `sp^(3)` hybridised but in `AlF_(3), Al` is `sp^(3)` hybridised.
D. `AlCl_(3)` exists as a dimer but `AlF_(3)` does not.
