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
Which of the following antiviral drug has a dual antiviral activity that is against HBV and HIV? 
Select and explain. 
A. Saquinavir, B. Abacavir, C. Emtricitabine, D. None of the above
C: Emtricitabine
Answer: C: Emtricitabine 
Explanation: Emtricitabine (FTC) ​
Emtricitabine, a fluoro derivative of lamivudine, inhibits both HIV and HBV.​
Reference: Lippincott Illustrated Reviews: Pharmacology Wolters Kluwer Sixth Edition page no 577​