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: Pathology
[{'content': 'Following is true about medullobastoma- \nSelect and explain. \nA. It is seen mainly in over 50 age group, B. It is radiosensitive tumour, C. Only treatment is surgery, D. Seen in anterior cranial fossa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]