This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematinics, Subject name: Pharmacology
[{'content': 'Iron is most commonly absorbed from: \nSelect and explain. \nA. Duodenum and upper jejunum, B. Lower jejunum, C. Stomach, D. Ileum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (A) Duodenum and upper jejunum(Ref: KK Sharma 2007/675, Katzung 11/e p571, KDT 8/e p646)Maximum iron absorption occurs in duodenum and proximal jejunum.Vitamin B12 is absorbed in distal ileum whereas folic acid is absorbed in proximal jejunum.', 'role': 'assistant'}]