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': 'Treatment of SVC syndrome due to Small Cell Carcinoma Lung is \nSelect and explain. \nA. Radiotherapy, B. Surgery, C. Chemotherapy, D. No treatment', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]