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: Unknown
Wallenberg syndrome involves which artery: 
Select and explain. 
A. AICA, B. PICA, C. Subclavian artery, D. PCA
B: PICA
Answer: B: PICA 
Explanation: Ref. API Textbook of Medicine. Pg. 510
There are two important Lateral Syndromes. PICA syndrome( Wallenberg ) and AICA syndrome. PICA syndrome is Lateral Medullary Syndrome and AICA Syndrome is Lateral Pontine Syndrome.