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': 'Dead bone is seen on the X-ray as: \nSelect and explain. \nA. More radiolucent, B. More radiopaque, C. With osteophytes growing out, D. Soap-bubble appearance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]