This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hernia, Subject name: Surgery
[{'content': 'The following patient shows painless lump in umbilicus with reduction on lying down. The diagnosis is: \nSelect and explain. \nA. Umbilical hernia, B. Fistula in Umbilicus, C. Omphalitis, D. Gastroschisis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Umbilical hernia* Small umbilical hernia with cough impulse can be identified clinically.* There is less chances for obstruction in children and we can observe for spontaneous closure upto 5 years in children.', 'role': 'assistant'}]