This is an electrophilic aromatic substitution on the phenol: bromine in the non-polar solvent carbon disulphide at low temperature delivers a single Br+, and the strongly activating hydroxyl group steers it to the para position, so the major product is the para-brominated phenol shown.
JEE Main · 2019 · 08 Apr 2019 · Shift 1 · Single correct option