This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
which of the following drug acts by inhibiting the protease enzyme of HIV 
Select and explain. 
A. Saquinavir, B. Neviparine, C. Abacavir, D. Enfuviide
A: Saquinavir
Answer: A: Saquinavir 
Explanation: Refer Goodman Gillman 12th/e p 1648 Drugs whose name end with NAVIR are HIV protease inhibitors Thus among the given options saquinavir is a protease inhibitor