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 of the following is not converted into active metabolite? 
Select and explain. 
A. Cyclophosphmide, B. Diazepam, C. Fluoxentine, D. Lisinopril
D: Lisinopril
Answer: D: Lisinopril 
Explanation: None