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 presented with skin pigmentation, hyperglycemia and his serum ferrith level is 900 microgram/l, possible diagnosis- \nSelect and explain. \nA. Acemloplasminemia, B. Atransferrinemia, C. Hereditary spherocytosis, D. Thalassemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]