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 deficients in von gierke&;s disease \nSelect and explain. \nA. Glucose 1 phosphatase, B. Glucose 6 phosphatase, C. Acid maltase, D. b Glucosidase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Repreated question', 'role': 'assistant'}]