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: Biochemistry
[{'content': 'McArdle’s disease is caused due to deficiency of \nSelect and explain. \nA. Glucose-6-phosphatase, B. Muscle (Myo) Phosphorylase, C. Lysosomal glucosidase, D. Microsomal Pi transporter', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]