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': 'Hemoglobin electrophoresis is used as confirmatory test in which of the following anemias? \nSelect and explain. \nA. Iron deficiency anemia, B. Polycythemia, C. Hereditary spherocytosis, D. Sickle cell anemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]