Which of the following is/are correct about $C_3{H}_{4}C{l}_2\left(A\right)$ ?

• A

  (A) has total number of 11 isomers.

• B

  All isomers of (A) are reducible and give addition products

• C

  All isomers of (A) can undergo free radical substitution reactions

• D

  All isomers of (A) can give electrophilic substitution reactions with Benzene is in presence of anhydrous $AlC{l}_3$ catalyst.