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: Pathology
[{'content': 'Syndrome associated with increased risk of leukemia is \nSelect and explain. \nA. Plummer Vinson syndrome, B. Klinefelter syndrome, C. Sturge Weber syndrome, D. Multiple hamartoma syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]