This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'Patent vitello-intestinal duct should preferably be operated at: \nSelect and explain. \nA. Bih, B. 6 months of age, C. 12 months of age, D. 3 years of age', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Patent Vitello-intestinal Duct The resulting umbilical fistula discharges mucus and rarely, feces A patent vitello-intestinal duct should be excised, together with a Meckel&;s Diveicula if present, preferably when the child is about 6 months old Ref: Bailey 27th edition Pgno : 1044', 'role': 'assistant'}]