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: Pathology
[{'content': "Which is a T cell tumor? \nSelect and explain. \nA. Burkitt's lymphoma, B. Mycosis fungiodes, C. Mantel cell Leukemia, D. Hairy cell Leukemia", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]