Identify acceptable names for the molecule. A benzene ring with two bromine atoms attached at different sites of the ring, so that either three carbon atoms or one carbon atom separate them, depending on the direction from which you count from a bromine atom.
An image of the compound described in the question is attached to this answer.
We need to reiterate here the rules of IUPAC nomenclature. The substituents in a compound must be named in such a way that they have the lowest number.
The compound described may also be named as 1,5-dibromobenzene but this name is disallowed because it gives the substituents a higher number than 1,3-dibromobenzene.
