This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Drugs undergoing acetylation include all except - \nSelect and explain. \nA. Dapsone, B. Metoclopramide, C. Procainamide, D. INH', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Metoclopramide Drugs metabolized by acetylation o Sulfonamides (including dapson) o Procainamide o PAS o INH o Hydralazine o Clonazepam", 'role': 'assistant'}]