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
All of the following calcify except – 
Select and explain. 
A. Medulloblastoma, B. Sturge weber syndrome, C. Meningioma, D. Ependymoma
A: Medulloblastoma
Answer: A: Medulloblastoma 
Explanation: Calcification is very rare in medulloblastoma.