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
Driven snow appearance is seen in 
Select and explain. 
A. Osteoid osteome, B. Simple bone cyst, C. Aneurysmal bone cyst, D. Pindborg tumor
D: Pindborg tumor
Answer: D: Pindborg tumor 
Explanation: Driven snow appearance  - Pindborg tumor.
Fallen fragment sign - Simple bone Cyst.