All of the following drugs are protease inhibitors except-

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.