This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
[{'content': 'Enzyme deficiency in glycogen storage disease type 5 is: \nSelect and explain. \nA. Glucose 6 phosphatase, B. Acid maltase, C. De branching enzyme, D. Myophpsphorylase deficiency', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D Harper, 26,h ed, p. 152, Table (18.2) & 25th ed, p. 206, Table (20.2)', 'role': 'assistant'}]