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: Dental
[{'content': 'Mycosis fungoides affects – \nSelect and explain. \nA. T Cells, B. B Cells, C. NK Cells, D. K Cells', 'role': 'user'}, {'content': "Answer: A \nExplanation: The histological hallmark of the mycosis fungoides is the presence of the Sezary-Lutzner cells. These are C':14 helper T cells.", 'role': 'assistant'}]