This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Digestion and Absorption, Subject name: Physiology
Iron is actively absorbed in : 
Select and explain. 
A. Stomach, B. Duodenum and proximal jejunum, C. Large intestine, D. Ileum
B: Duodenum and proximal jejunum
Answer: B: Duodenum and proximal jejunum 
Explanation: Ans. is 'b' i.e. Duodenum and proximal jejunum Harrison writes - "Iron absorption takes place largely in the proximal small intestine ".Ganong writes - "Almost all iron absorption occurs in the duodenum".Robbins writes - "Most iron is absorbed in the duodenumGhai writes - "Iron is absorbed from the duodenum and upper jejunum ".