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': 'Umbilical hernia in a child - indication for surgery is/are \nSelect and explain. \nA. Failure to disappear by 3 years, B. > 2 cm size, C. Symptomatic, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: An umbilical hernia is d/t fascial defect at the umbilicus.\n\nTreatment :\n\nMost hernias close spontaneously by 1 yr of age. Even larger hernias are known to disappear spontaneously by 5-6 yrs of age.\n\nSurgery is advised for hernias :\n\nPersisting beyond 4-5 yrs.\nCausing symptoms.\nBecoming strangulated.\nDefect exceeding 2 cm.\nProgressively enlarging hernia after the age of 1-2 yrs.\nStrapping is ineffective.', 'role': 'assistant'}]