What is IUPAC name of the following organic compound?

The given organic compound consists of a benzene ring with three hydroxyl ($-OH$) groups attached to it.

According to IUPAC nomenclature rules, the numbering of the carbon atoms in the benzene ring should be done in such a way that the substituents get the lowest possible locants.

Starting the numbering from one of the terminal $-OH$ bearing carbon atoms and moving towards the others gives the locants $1, 2,$ and $3$. Any other numbering scheme would result in higher locants (e.g., $1, 5, 6$ or $2, 3, 4$), which violates the lowest locant rule.

Since there are three hydroxyl groups, the suffix '-triol' is used. The parent aromatic ring is benzene.

Therefore, the IUPAC name of the compound is Benzene-1,2,3-triol.

Answer: Benzene-1,2,3-triol