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': 'Thyroid carcinoma with pulsatile vascular skeletal metastasis is - \nSelect and explain. \nA. Papillary, B. Follicular, C. Medullary, D. Anaplastic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pulsatile secondaries are seen in:\n\nFollicular carcinoma Thyroid\nRenal cell carcinoma', 'role': 'assistant'}]