All are nucleosides used in the treatment of chronic HBV, EXCEPT:: (A) Lamivudine, (B) Telbivudine, (C) Emtricitabine, (D) Ribavirin
Answer is D. Seven drugs are available for the treatment of chronic hepatitis B: Conventional interferon alpha, Pegylated interferon alpha L-nucleosides (lamivudine, telbivudine, and emtricitabine), Deoxyguanosine Analogs (entecavir) and Acyclic nucleoside phosphonates (adefovir and tenofovir). Ribavirin is used to treat chronic HCV Ref: Journal of Hepatology 50 (2009) 227-242.