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: Medicine
[{'content': 'Stage I mycosis fundoides treatment A/E - \nSelect and explain. \nA. Topical corticosteroid, B. Skin electron beam therapy, C. Radiation, D. UVB therapy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]