This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Sulfonamide is conjugated with \nSelect and explain. \nA. Acetylation, B. Methylation, C. Hydroxylation, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref-KDT 6/e p683 Acetylation describes a reaction that introduces an acetyl functional group into a chemical compound .', 'role': 'assistant'}]