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 one of the following drugs does not have active metabolite \nSelect and explain. \nA. Diazepam, B. Lisinopril, C. Propanolol, D. Allopurinol', 'role': 'user'}, {'content': "Answer: B \nExplanation: Lisinopril - It is a lysine derivative of enalaprilat, doesn't require hydrolysis to become active ACE inhibitor. It's oral absorption is slow and incomplete, but unaffected by food.", 'role': 'assistant'}]