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: Surgery
[{'content': 'All are common sites of 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: Ans. is 'b' i.e., Veebral aery 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: (Ref.- Harrison 17/e) - the terminal internal carotid aery - middle cerebral aery bifurcation - top of the basilar aery", 'role': 'assistant'}]