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': 'Commonest Type of Intracranial Tumour is: \nSelect and explain. \nA. Astrocytoma, B. Medulloblastoma, C. Meningioma, D. Secondaries', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Astrocytoma', 'role': 'assistant'}]