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: Skin
[{'content': 'Mycosis fungoides is a: \nSelect and explain. \nA. Cutaneous T-cell lymphoma, B. T-cell and B-cell lymphoma, C. B cell Lymphoma, D. Derived from stem cell', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cutaneous T-cell lymphoma', 'role': 'assistant'}]