IUPAC name of trisubstituted benzene ring
As -CN has the highest priority, root-word is benzonitrile. Lowest locant is 2 for -Br.
So, the name given is:
2-bromo-5-hydroxybenzonitrile

As the functional group is -CN, with highest priority, no need to look for priority of -OH and -Br; just look for lowest locant.