This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
All of the following drugs are protease inhibitors except 
Select and explain. 
A. Nelfinavir, B. Saquinavir, C. Abacavir, D. Ritonavir
C: Abacavir
Answer: C: Abacavir 
Explanation: Refer KDT 6/e p767 All protease inhibitors end with NAVIR like Nelfinavir, saquinavir, and Ritonavir Abacavir is an NI