This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: nutrition and digestion, Subject name: Biochemistry
[{'content': 'Vit. B12 is absorbed in the \nSelect and explain. \nA. Stomach, B. Duodenum, C. Lower jejunum, D. Terminal ileum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: One molecule of IF can combine with 2 molecules of B12. This IF-B12 complex is attached with specific receptors on mucosal cells. The whole IF-B12 complex is internalized . It may be noted that B12 is absorbed from the ileum. Ref: DM Vasudevan, page no: 404', 'role': 'assistant'}]