<prompt> Vitamin B12 is mainly absorbed from?DuodenumJejunumIleumColon  <response>: ANSWER: C IleumREF: Ganong, 22nd edition, p471Bile salts and vitamin B12 are mainly absorbed by ileumIron and vitamins other than B12 are absorbed mainly from proximal small intestine duodenum and jejunumMaximum fat absorption- JejunumLong chain fatty acid absorption- Duodenum JejunumShort chain fatty acid- Colon 