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': 'Acyclovir is used for the following viral infection : \nSelect and explain. \nA. Rabies virus, B. Cytomegalovirus, C. Herpes simplex virus, D. Human immunodeficiency virus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]