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': 'Which of the following is NOT a myeloproliferative disease: \nSelect and explain. \nA. Polycythemia rubra vera, B. Acute myeloid leukemia, C. Chronic myeloid leukemia, D. Essential thrombocytosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Acute myeloid leukemia) The myeloproliferative disorders are characterized pathophysiologically by clonal expression of a multipotent hematopoitic progenitor cell with the overproduction of one or more of the formed elements of Blood. These disorders may transform into acute leukemia naturally or as a consequence of mutagenic treatment. Myeloproliferative disorders classically include: - Polycythemia veraQ - Idiopathic myelofibrosisQ - Essential thrombocytosisQ - Chronic myeloid leukemiaQ', 'role': 'assistant'}]