<prompt> Which of the following antiviral drug has a dual antiviral activity that is against HBV and HIV?SaquinavirAbacavirEmtricitabineNone of the above  <response>: 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 