Which from following functional groups has highest priority order for naming the polyfunctional group compounds?

According to IUPAC nomenclature, the principal functional group in polyfunctional compounds is determined by a priority hierarchy. Functional groups are ranked as follows: carboxylic acids ($-\mathrm{COOH}$), sulfonic acids ($-\mathrm{SO_3 H}$), acid anhydrides, esters, acid halides ($-\mathrm{COCl}$), amides, nitriles, aldehydes ($-\mathrm{CHO}$), ketones, alcohols ($-\mathrm{OH}$), and amines.

Given the options, the sulfonic acid group ($-\mathrm{SO_3 H}$) holds the highest priority at rank 2, making it the principal functional group.