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
Which one of the following drugs does not have active metabolite 
Select and explain. 
A. Diazepam, B. Lisinopril, C. Propanolol, D. Allopurinol
B: Lisinopril
Answer: B: Lisinopril 
Explanation: 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.