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
Sunburst appearance found in -a) Osteosarcomab) Ewings sarcomac) Osteoclastomad) Osteoid osteomae) Chondrosarcoma 
Select and explain. 
A. ac, B. a, C. ad, D. ab
D: ab
Answer: D: ab 
Explanation: Sun-ray (sunburst) appearance and Codman's triangle : -


Typical features of osteosarcoma.
May also be seen in Ewing's sarcoma, osteomyelitis.


Onion-peel appearance


Typical feature of Ewing's sarcoma.
May also be seen in osteosarcoma, and osteomyelitis