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
[{'content': 'Which virus remains dormant but can be reactivated is - \nSelect and explain. \nA. Herpes simplex, B. Herpes zoster, C. EBvirus, D. CMV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is b Herpes zoster', 'role': 'assistant'}]