This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: X-RAYS, Subject name: Radiology
Dead bone on an X-ray looks: 
Select and explain. 
A. More radio-opaque, B. Radiolucent, C. Less radio-opaque, D. Not seen at all
A: More radio-opaque
Answer: A: More radio-opaque 
Explanation: In chronic osteomyelitis there is dead dense bone in center called sequestrum , which is more radio opaque.