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: Surgery
[{'content': 'The treatment of anaplastic carcinoma of thyroid is \nSelect and explain. \nA. Total thyroidectomy, B. Palliative radiotherapy, C. Radioactive Iodine, D. Tracheostomy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]