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: Surgery
[{'content': 'Antiperistalsis is seen in - \nSelect and explain. \nA. Distal colon, B. Jejunum, C. Proximal Colon, D. Ileum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Right colon is the fermentation chamber of the human GI tract\n• Bacteria are most metabolically active in cecum\n• Left colon is a site of storage and dehydration of stool.', 'role': 'assistant'}]