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': 'Macrocytic anemia occurs in all except \nSelect and explain. \nA. Thiamine deficiency, B. Liver disease, C. Orotic aciduria, D. Copper deficiency', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Copper - containing ceruloplasmin helps in iron transport.\xa0Copper is an integral part if ALA synthase enzyme which is used in haem synthesis.\nCopper helps the uptake of iron by normoblasts. Thus in copper deficiency, RBC count is reduced, cell size is small but hemoglobin concentration is more or less normal.\nSo it results in microcytic normochromic anemia.', 'role': 'assistant'}]