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': 'Radiotherapy is treatment of choice in \nSelect and explain. \nA. Sarcoidosis, B. Tuberculosis, C. Monoclonal hypogammaglobulinemia, D. Sarcomas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]