This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Most common cause of viral meningoencephalitis? \nSelect and explain. \nA. Enterovirus, B. Arbovirus, C. Herpes virus, D. CMV', 'role': 'user'}, {'content': "Answer: C \nExplanation: Harrison's textbook of internal medicine 17th edition . *Most impoant viruses causing the sporadic cases of encephalitis in immunocompetent adults are herpes viruses (HSV,VZV,EBV).", 'role': 'assistant'}]