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': 'Drug used in hepatitis B infection is \nSelect and explain. \nA. Entecavir, B. Astacavir, C. Zanamivir, D. Abacavir', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Entecavir Treatment of acute hepatitis Hepatitis B - No treatment is required. Hepatitis C - Pegylated Interferon (PEG - IFN). Treatment of chronic hepatitis Hepatitis B - Lamivudin, entecavir (preferred) or interferon. Hepatitis C - Pegylated Interferon (PEG - IFN), entecavir plus ribavirin.", 'role': 'assistant'}]