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: Medicine
[{'content': 'Most common site of cerebral infarction is in the territory of \nSelect and explain. \nA. Anterior cerebral aery, B. Middle cerebral aery, C. Posterior cerebral aery, D. Posterior inferior cerebellar aery', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Middle cerebral aery", 'role': 'assistant'}]