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: Biochemistry
[{'content': 'Site of absorption of Vitamin B12 \nSelect and explain. \nA. Duodenum, B. Iejunum, C. Ileum, D. Colon', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Mnemonic Vitamin B12: 1 + 2 = 3\nSo maximum absorption in third part of small intestine. i.e: Ileum.', 'role': 'assistant'}]