This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
[{'content': 'Wallenberg syndrome involves which aery? \nSelect and explain. \nA. Anterior inferior cerebellar aery, B. Posterior inferior cerebellar aery, C. Subclan aery, D. Posterior cerebral aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Wallenberg syndrome usually occurs due to involvement of ipsilateral veebral aery, but occasionally it is due to block in an ipsilateral posterior inferior cerebellar aery.', 'role': 'assistant'}]