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
Wallenberg syndrome involves which aery? 
Select and explain. 
A. Anterior inferior cerebellar aery, B. Posterior inferior cerebellar aery, C. Subclan aery, D. Posterior cerebral aery
B: Posterior inferior cerebellar aery
Answer: B: Posterior inferior cerebellar aery 
Explanation: 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.