This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'All are common sites of a berry aneurysm, EXCEPT- \nSelect and explain. \nA. Posterior cerebral aery, B. Veebral aery, C. Anterior cerebral aery, D. Middle cerebral aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Location of Berry aneurysms Berry aneurysms commonly arise at the bifurcation of major aeries. Approximately 85% of intracranial aneurysms arise on the anterior circulation, mostly on the circle of Willis. Three most common locations are: the terminal internal carotid aery middle cerebral aery bifurcation top of the basilar aery Ref : Harrison, 17/e p1726', 'role': 'assistant'}]