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': "Abnormal resorption followed by apposition of bone leaving deeply stained lines, which occurs in Paget's disease. These lines are known as: \nSelect and explain. \nA. Reversal lines, B. McGregor lines, C. Campbell's lines, D. None of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]