This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
maximum absorption of IRON is seen in? 
Select and explain. 
A. duodenum, B. ileum, C. colon, D. jejunum
A: duodenum
Answer: A: duodenum 
Explanation: absorption of iron is maximum in duodenum. vit b12 absorption is maximum in ileum ref: guyton and hall