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: Medicine
[{'content': "Wallenberg's syndome does not involve - \nSelect and explain. \nA. IX, B. X, C. XI, D. XII", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]