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
[{'content': 'Wallenberg syndrome involves which artery: \nSelect and explain. \nA. AICA, B. PICA, C. Subclavian artery, D. PCA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. API Textbook of Medicine. Pg. 510\nThere are two important Lateral Syndromes. PICA syndrome( Wallenberg ) and AICA syndrome. PICA syndrome is Lateral Medullary Syndrome and AICA Syndrome is Lateral Pontine Syndrome.', 'role': 'assistant'}]