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': 'Longest transit time in GIT is seen in: \nSelect and explain. \nA. Stomach, B. Jejunum, C. Colon, D. Ileum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. ColonTransit time in Small Intestine & ColonThe first pa of a test meal reaches the caecum in about 4 hours, all of the undigested poions have entered the colon in 8-9 hours.On average, the first remnants of the meal reach the hepatic flexure in 6 hours, the splenic flexure in 9 hours & the pelvic colon in 12 hours.From the pelvic colon to the anus, transpo in much slowerQ.As much as 25% of the residue of a test meal still be in the rectum in 72 hours.So, the transit time of colon is the longestQ.', 'role': 'assistant'}]