Bromobenzene on treatment with fuming `H_(2)SO_(4)` gives a compound which one treatment with `Cl_(2)//AlCl_(3)` gives (A), (A) on distillation with dil. `H_(2)SO_(4)` gives (B). (B) on treatment with an eq. of Mg in dry ether gives (C ). (C ) on treatment with `CH_(3)CHO` followed by hydrolysis gives (D). (D) on treatment with NaOl gives (E). Identify the structures of (A) to (E).