This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Viral, Subject name: Pharmacology
All drugs are used in AIDS EXCEPT: 
Select and explain. 
A. Abacavir, B. Ritonavir, C. Acyclovir, D. Tenofovir
C: Acyclovir
Answer: C: Acyclovir 
Explanation: Ans. (c) AcyclovirRef. Katzung 11th ed. / 860* Acyclovir is an acyclic guanosine derivative with clinical activity against HSV-1, HSV-2, and VZV. In vitro activity against Epstein-Barr virus (EBV), cytomegalovirus (CMV), and human herpesvirus-6 (HHV-6).ANTI-RETROVIRAL DRUGS* Nucleoside reverse tanscriptase inhibitor: Zidovudine, Stavudine, Lamivudine, Didanosine, Emtricitabine, Zalcitabine, Abacavir* Nucleotide reverse tanscriptase inhibitor: Tenofovir* Protease inhibitors: Indinavir, Saquinavir, Ritonavir, Atazanavir, Nelfinavir, Amprenavir, Lopinavir.