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
Most common cause of viral meningoencephalitis? 
Select and explain. 
A. Enterovirus, B. Arbovirus, C. Herpes virus, D. CMV
C: Herpes virus
Answer: C: Herpes virus 
Explanation: 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).