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 a least enzyme inhibiting protease inhibitor? 
Select and explain. 
A. Ritonavir, B. Saquinavir, C. Lopinavir, D. Indinavir
B: Saquinavir
Answer: B: Saquinavir 
Explanation: Protease inhibitor with maximum enzyme inhibiting property :Ritonavir
Protease inhibitor with least enzyme inhibiting property : Saquinavir