This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
[{'content': 'Most common intracranial tumor in adults is - \nSelect and explain. \nA. Astrocytoma, B. Metastases, C. Meningioma, D. Oligodendroglioma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Metastases * Brain metastases are the most common intracranial tumors in adults and account for more than one half of the brain tumors.* The most common mechanism is by hematogenous route.* The most common site is at the junction of grey and white matter.", 'role': 'assistant'}]