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': 'Lamivudine acts against which of the following viruses? \nSelect and explain. \nA. HIV, B. HBV, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lamivudine inhibits HBV DNA polymerase and HIV reverse transcriptase by competing with deoxycytidine triphosphate for incorporation into the viral DNA, resulting in chain termination. Lamivudine achieves 3-4 log decreases in viral replication in most patients and suppression of HBV DNA to undetectable levels in about 44% of patients. Ref: Katzung 11th edition Chapter 49.', 'role': 'assistant'}]