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 is not converted to an active metabolite? 
Select and explain. 
A. Quinapril, B. Fosinopril, C. Benzopril, D. Lisinopril
D: Lisinopril
Answer: D: Lisinopril 
Explanation: Lisinopril: It is the lysine derivative of enalaprilat; does not require hydrolysis to become active ACE inhibitor. 
 KEY CONCEPT:-
All ACE inhibitors are prodrugs except captopril and lisinopril. Other drugs like enalapril are converted to its active metabolite (enalaprilat) and thus are slow acting.
Reference: Essentials of Medical Pharmacology Eighth Edition KD TRIPATHI page no 532