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
Radiographically 'Sequestrum' formed in osteomyelitis is: 
Select and explain. 
A. More opaque than healthy bone, B. Same opaque than healthy bone, C. Less opaque than healthy bone, D. None of the above
A: More opaque than healthy bone
Answer: A: More opaque than healthy bone 
Explanation: None