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: Physiology
[{'content': 'Short chain fatty acid produced by bacteria are maximally absorbed in: \nSelect and explain. \nA. Duodenum, B. Colon, C. Ileum, D. Jejunum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Increasing attention is being focused on short-chain fatty acids (SCFAs) that are produced in the colon and absorbed from it. SCFAs are 2–5 carbon weak acids that have an average normal concentration of about 80 mmol/L in the lumen. About 60% of this total is acetate, 25% propionate, and 15% butyrate. They are formed by the action of colonic bacteria on complex carbohydrates, resistant starches\xa0and other components of the dietary fiber, that is, the material that escapes digestion in the upper\xa0gastrointestinal tract and enters the colon.\nReference: Ganong’s Review of Medical Physiology T W E N T Y - F I F T H\xa0 \xa0E D I T I O N page no 483', 'role': 'assistant'}]