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': "Meckel's diveiculum is remnant of - \nSelect and explain. \nA. Vitello intestinal duct, B. Urachus, C. Oganic diaphragm, D. None", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Vitello intestinal duct", 'role': 'assistant'}]