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
Abnormal resorption followed by apposition of bone leaving deeply stained lines, which occurs in Paget's disease. These lines are known as: 
Select and explain. 
A. Reversal lines, B. McGregor lines, C. Campbell's lines, D. None of the above
A: Reversal lines
Answer: A: Reversal lines 
Explanation: None