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': 'LAP score is decreased in which of the following conditions ? \nSelect and explain. \nA. Polycythemia vera, B. CML, C. Myelofibrois, D. AML', 'role': 'user'}, {'content': 'Answer: B \nExplanation: LAP score is decreased in CML and PNH.', 'role': 'assistant'}]