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: Microbiology
Encephalitis is caused by : 
Select and explain. 
A. HSV-I, B. EBV, C. Infectious mononucleosis, D. CMV
A: HSV-I
Answer: A: HSV-I 
Explanation: Infections caused by HSV-1

Acute gingivo-stomatitis
Herpes labialis
Kerato-conjuctivitis 
Eczema herpeticum
Encephalitis
Dendritic keratitis

Ref : textbook of microbiology, C P Baveja, 5th edition , Pg no:444