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: Medicine
Which among the following anti-HIV drugs is also used to treat viral Hepatitis B ? 
Select and explain. 
A. Enfuviritide, B. Lamivudine, C. Efavirenz, D. Ritonavir
B: Lamivudine
Answer: B: Lamivudine 
Explanation: None