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': 'Total iron binding capacity is increased in \nSelect and explain. \nA. Iron deficiency anaemia, B. Anaemia of chronic disease, C. Sideroblastic anaemia, D. β - thala ssemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Iron deficiency anaemia.\nSerum\xa0\xa0↓.\nSerum ferritin\xa0↓.\nTIBC\xa0↑.', 'role': 'assistant'}]