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 a ragged or poorly defined margin is seen in 
Select and explain. 
A. squamous cell carcinoma, B. osteomyelitis, C. secondarily infected cyst, D. all of the above
D: all of the above
Answer: D: all of the above 
Explanation: None