What is the major product of the reaction between phenol and bromine in the presence of iron(III) bromide?
Correct: A
Phenol reacts with bromine in the presence of iron(III) bromide (a catalyst) to give 2,4,6-tribromophenol as the major product. The reaction is an example of electrophilic aromatic substitution, where the hydroxyl group (-OH) on phenol directs the bromine electrophile to the ortho and para positions.