Benzene is prepared in the laboratory from which one of the following compounds?

Which of the following compounds would exhibit aromatic character?

Calculate the sum of $\alpha$-hydrogen atoms in the given structures $(i)$ and $(ii)$:
$(i)$ $1,3$-dimethylbenzene
(ii) $1,3$-diethylbenzene
Sum $= (i) + (ii) = ?$

The correct structure of benzene was proposed by

Which species is generated during the chlorination of an aromatic ring?

Rank the following reactions $A$,$B$,and $C$ in order of increasing rate.