Which of the following statement about anhydrous aluminium chloride is correct?

AlCl₃ forms fumes in moist air because of hydrolysis. Hydration energy of Al³⁺ is very high, therefore AlCl₃ can undergo hydrolysis and thereby known to be hygroscopic in nature.

It sublimes when heated around $180°\mathrm{C}.$

AlCl₃ is electron-deficient, therefore exist as dimer (Al₂Cl₆) in both vapor phase and in non polar solvents such as benzene, aniline, and so on. This implies that AlCl₃ is a Lewis acid not a Lewis base.