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': 'Which of the following is not a chronic myelopro liferative disorder \nSelect and explain. \nA. Polycythemia vera, B. Acute myeloid leukemia, C. CML, D. Essential thrombocytopenia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Example of mycloproliferative disorders\n\nPolycythemia vera\n1o myelofibrosis\nEssential thrompocythemia\nCML', 'role': 'assistant'}]