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': 'Which among the following anti-HIV drugs is also used to treat viral hepatitis B? \nSelect and explain. \nA. Enfuvirtide, B. Lamivudine, C. Efavirenz, D. Ritonavir', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]