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: Orthopaedics
Ring sequestrum is seen in - 
Select and explain. 
A. Typhoid osteomyelitis, B. Chronic osteomyelitis, C. Amputation stump, D. Tuberculosis osteomyelitis
C: Amputation stump
Answer: C: Amputation stump 
Explanation: Excessive periosteal stripping during amputation may result in ring sequestrum in amputation stump.