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': 'Laboratory evaluation for the differential diagnosis of chronic myeloproliferative disorders includes all the following except- \nSelect and explain. \nA. Chromosomal evaluation, B. Bone marrow aspiration, C. Flow-cytometric analysis, D. Determination of red blood cell mass', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]