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
[{'content': 'All of the following drugs are protease inhibitors except- \nSelect and explain. \nA. Nelfinavir, B. Saquinavir, C. Abacavir, D. Ritonavir', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Abacavir Antiretroviral drugs a) Nucleoside reverse transcriptase inhibitors (NIs) - Zidovudin, Didanosine, Zalcitabine, Stavudine, Larnivudine, Abacavir. b) Nucleotide reverse transcriptase inhibitor Tenofovir (Katzung I Oth/e) c) Nonucleoside reverse transcriptase inhibitors (NNIS) - Nevirapine, Eirenz, Delavirdine, Etravirine Rilpivirine. d) Protease inhibitors - Ritonavir, Indinavir, Nelfinavir, Saquinavir, amprenavir, Lopinavir, Fosamprenavir, Atazanavir, Darunavir, Tipranavir. e) Fusion inhibitor - Enfuviide, Maraviroc. f) Integrase inhibitors - Roltegravir, Elvitegravir.", 'role': 'assistant'}]