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
Acyclovir is used for the following viral infection : 
Select and explain. 
A. Rabies virus, B. Cytomegalovirus, C. Herpes simplex virus, D. Human immunodeficiency virus
C: Herpes simplex virus
Answer: C: Herpes simplex virus 
Explanation: None