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: Pediatrics
WHO grade I tumour is located in Cerebellum On histological examination Rosenthal fibres seen what is the most probable diagnosis? 
Select and explain. 
A. Medulloblastoma, B. Crainopharyngioma, C. Pilocytic astrocytoma, D. Ependymoma
C: Pilocytic astrocytoma
Answer: C: Pilocytic astrocytoma 
Explanation: Pilocytic astrocytoma :

WHO grade I tumour.
Usually occurs in Cerebellum.
Biphasic tumour.
Rosenthal fibres seen.