This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Enzyme deficiency in Hurler syndrome? \nSelect and explain. \nA. Iduronate sulfatase, B. a-l-Iduronidase, C. b-Galactosidase, D. Galactosamine 6-sulfatase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Disease name Abbretion Enzyme Defective GaG(s) affected Symptoms Hurler syndrome MPS I a-l-Iduronidase Dermatan sulfate, Heparan sulfate Mental retardation, coarse facial features, hepatosplenomegaly, cloudy cornea Reference: Harper; 30th edition; Page no:639; Table: 50-8', 'role': 'assistant'}]