Which product is formed when the following compound is treated with B r 2 in the presence of F e B r 3 ?

m-xylene on bromination with bromine in presence of ferric bromide gives 1-bromo-2,4-dimethylbenzene.
This is represented by option C which shows a pair of identical compounds.
This is an electrophilic aromatic substitution reaction and since the methyl group is ortho para directing, the substitution occurs at a position which is ortho to one methyl group and para to other methyl group.