<prompt> Iron is most commonly absorbed from:Duodenum and upper jejunumLower jejunumStomachIleum  <response>: Ans. A Duodenum and upper jejunumRef: KK Sharma 2007675, Katzung 11e p571, KDT 8e p646Maximum iron absorption occurs in duodenum and proximal jejunum.Vitamin B12 is absorbed in distal ileum whereas folic acid is absorbed in proximal jejunum. 