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: Medicine
In childern, most common posterior fossa tumour is- 
Select and explain. 
A. Meningioms, B. Astrocytoma, C. Medulloblastoma, D. Glioblastoma multiforme
B: Astrocytoma
Answer: B: Astrocytoma 
Explanation: None