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
Most radiosensitive brain tumor is – 
Select and explain. 
A. Astrocytoina, B. Ependyinoma, C. Medulloblastoma, D. Craniopharyngeoma
C: Medulloblastoma
Answer: C: Medulloblastoma 
Explanation: Of all tumors arising within the brain, except lymphoma, medulloblastoma is the most sensitive.