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
[{'content': 'Tumor with best prognosis is: \nSelect and explain. \nA. Ependymoma, B. Medulloblastoma, C. Cerebellar astrocytoma, D. Glioblastoma multiforme', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Cerebellar Astrocytomas): Most cerebellar astrocytomas are histologically Juvenile pilocytic astrocytomas. Juvenile pilocystic astrocytomas are benign and non infiltrating astrocytomas with an excellent prognosis (95% 5 year survival with surgery alone) Ependymomas are also histologically benign but carry a worse prognosis than cerebellar astrocytomas with (80% 5 year survival rate) Medulloblastomas and Glioblastoma Multiforme are malignant tumors with a poor prognosis.', 'role': 'assistant'}]