This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': "African Burkitt's lymphoma is caused by - \nSelect and explain. \nA. CMV, B. EBV, C. HZV, D. HSV", 'role': 'user'}, {'content': 'Answer: B \nExplanation: repeat', 'role': 'assistant'}]