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': 'Which is the most common site for berry aneurysm in circle of willis is seen at bifurcation between \nSelect and explain. \nA. Anterior communicating artery and anterior cerebral artery, B. Basilar artery and posterior cerebral artery, C. Internal carotid artery and posterior communicating artery, D. Anterior cerebral and middle cerebral artery', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Anterior communicating artery and anterior cerebral artery AZX", 'role': 'assistant'}]