Aluminium chloride exists as a dimer,$Al_2Cl_6$,in the solid state as well as in solutions of non-polar solvents such as benzene. When dissolved in water,it gives:

• A
  $[Al(H_2O)_6]^{3+} + 3Cl^{-}$
• B
  $[Al(H_2O)_6]^{3+} + 3Cl^{-}$
• C
  $Al^{3+} + 3Cl^{-}$
• D
  $Al_2O_3 + 6HCl$