This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Medicine
[{'content': 'Mucosal transfer of iron in GIT is by: \nSelect and explain. \nA. Transferrin, B. Apoferritin, C. Apotransferrin, D. Ferritin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: bRef: Harrison, 16thed, p. 587, Fig. 90.1', 'role': 'assistant'}]