$\begin {array} {1 1} (A)\;\text{All the bond angles $Cl - Al - Cl$ and $ Al - Cl - Al $ in $Al_2Cl_3$ are identical} \\ (B)\;\text{All the bond lengths $Cl - Al $ in $Al_2Cl_3$ are identical} \\ (C)\;\text{All the bond lengths $Cl - Al $ in $Al_2Cl_3$ as well as all the bond angles $Cl - Al - Cl$ and $ Al - Cl - Al $ are different} \\ (D)\;\text{The bond lengths of terminal $Al - Cl$ and bridged $Al - Cl $ bonds are different and also outer bond angle $Cl - Al- Cl$ and $Al - Cl - Al $ have different values} \end {array}$
