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: Pharmacology
Iron is most commonly absorbed from : 
Select and explain. 
A. Duodenum and upper jejunum, B. Lower jejunum, C. Stomach, D. Ileum
A: Duodenum and upper jejunum
Answer: A: Duodenum and upper jejunum 
Explanation: Maximum iron absorption occurs in the duodenum and proximal jejunum.
Vitamin B12 is absorbed in distal ileum whereas folic acid is absorbed in proximal jejunum.