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': 'A patient with sore throat has a positive Paul Bunnell test. The causative organism is- \nSelect and explain. \nA. EBV, B. Herpesvirus, C. Adenovirus, D. CMV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]