This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CNS Tumors, Subject name: Surgery
[{'content': 'The CNS tumor present with calcification: \nSelect and explain. \nA. Oligodendroglioma, B. Astrocytoma, C. Medulloblastoma, D. Pheochromocytoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Oligodendroglioma is associated with calcification. BT associated with calcification (COM):CraniopharyngiomaQ (most) > ODGQ (90%) > MeningiomaQ (20-25%)', 'role': 'assistant'}]