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': 'Which of the following is a prodrug ? \nSelect and explain. \nA. Lisinopril, B. Enalapril, C. Chlorpromazine, D. Dopamine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: All ACE inhibitors are prodrugs except captopril and\xa0lisinopril.', 'role': 'assistant'}]