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: Physiology
[{'content': 'Vitamin B12 is mainly absorbed from \nSelect and explain. \nA. Stomach, B. Jejunum, C. Ileum, D. Colon', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Normally, vitamin B12 is readily absorbed in the last pa of the small intestine (ileum), which leads to the large intestine. However, to be absorbed, the vitamin must combine with intrinsic factor, a protein produced in the stomach.Ref: Ganong&;s review of medical physiology 23rd edition Page no: 458', 'role': 'assistant'}]