This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Commonest type of intracranial tumor is \nSelect and explain. \nA. Astrocytoma, B. Medulloblastoma, C. Meningioma, D. Secondaries', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Reference 1315', 'role': 'assistant'}]