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: Physiology
[{'content': 'Iron absorption takes place in which pa of intestine? \nSelect and explain. \nA. Duodenum, B. Ileum, C. Jejunum, D. Colon', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., DuodenumAlmost all iron absorption occurs in the duodenum.", 'role': 'assistant'}]