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': 'A patient with microcytic hypochromic anemia, Hb-9%, serum iron is 20 ?/dl, ferritin level 800 mg/ ml, transferrin percentage saturation is 64. What is possible diagnosis - \nSelect and explain. \nA. Atransferrinemia, B. Iron deficiency anemia, C. DMT 1 mutation, D. Hemochromatosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]