This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System Tumors, Subject name: Surgery
[{'content': 'Most common brain tumour is- \nSelect and explain. \nA. Astrocytoma, B. Meningioma, C. Metastasis, D. Oligodendroma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Metastasis o MC brain tumors-Metastaseso MC primary brain tumor-Gliomao MC Glioma-Astrocytomaso MC Astrocytomas-Glioblastoma multiforme", 'role': 'assistant'}]