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': 'Which of the following is a prodrug \nSelect and explain. \nA. Enalapril, B. Clonidine, C. Salmetarol, D. Acetazolamide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All ACE inhibitor are prodrug except captopril and lisnopril', 'role': 'assistant'}]