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': 'Receptor of EBV is \nSelect and explain. \nA. CR1, B. CR2, C. CD20, D. CD19', 'role': 'user'}, {'content': 'Answer: B \nExplanation: EBV binds to CD21 or CR2 receptor.', 'role': 'assistant'}]