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': 'EBV Causes: \nSelect and explain. \nA. Ca cervix, B. Ca Nasopharynx, C. Ca lung, D. Ca uterus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ca Nasopharynx', 'role': 'assistant'}]