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
Radiological feature of osteosarcoma is – 
Select and explain. 
A. New bone formation, B. Sunray appearance, C. Cotton wool app., D. Osteoid formation
B: Sunray appearance
Answer: B: Sunray appearance 
Explanation: None