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 maximum absortion of Iron \nSelect and explain. \nA. Duodenum, B. Jejunum, C. Ileum, D. Colon', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mnemonic\nIron - Roman number One\xa0\nSo maximum absorption in first part of small intestine. i.e: Duodenum.', 'role': 'assistant'}]