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': "In Moore's classification of omphalocole (examphalos), type I umbilical defect is less than .... cm. \nSelect and explain. \nA. 0.5, B. 2.5, C. 3.5, D. 4.5", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b i.e. 2.5 Moore suggested a classification of omphalocele into types 1, 2 and 3 with the diameters of < 2.5cm, 2.5 to 5 cm and > 5 cm respectively.', 'role': 'assistant'}]