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
Codman's triangle is a feature of – 
Select and explain. 
A. Osteosarcoma, B. Osteochondroma, C. Osteoid osteoma, D. Chondrosarcoma
A: Osteosarcoma
Answer: A: Osteosarcoma 
Explanation: Codman's triangle is characteristically seen in osteosarcoma. It may also be seen in Ewing's sarcoma and osteomyelitis.