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: Radiology
[{'content': 'Expansible pulsating secondary metastasis is a feature of \nSelect and explain. \nA. Basal cell carcinoma, B. Renal cell carcinoma, C. Osteogenic sarcoma, D. Carcinoma prostate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Renal Cell carcinoma', 'role': 'assistant'}]