<prompt> Which of the following is absorbed in the colon ?IronProteinsBile saltsElectrolytes  <response>: D i.e. Electrolytes- Maximum absorption or reabsorption of water from gastrointestinal tract occurs in jejunumQ.- Ca2, Cl-, Fe2, SO42-, long chain fatty acids and vitamins except B12are mainly absorbed in upper small intestine i.e., jejunum duodenumQ.- Sodium Na is mainly absorbed is upper lower small intestine jejunum, ileum and colonQ. And K in upper mid lower small intestine.- Sugars and amino acids are mainly absorbed in mid small intestine whereas bile salts, and vitamin B12 in lower small intestine ileumQSubstance absorbedSite: Small intestineColonUpper Proximal Jejumummainly duodenum in mostcases except NaC1 HCO3-MidLowerdistalileum1. Na32332. Cl-323. ca-32 4. Long chain fatty acid absorption conversion to triglycerides3205. Water soluble fat soluble vitaminsexcept B1232006. Iron Fe3?7. SO4--20?8. Pyrimidines thymine uracil 9. KSecretion10. Sugars glucose, galactose etc.232011. Aminoacids232012. Antibodies in newborn23?13. Bile salts3 14. Vitamin B1203015. Betaine, Dimethylglycine, sacrosine 22? 