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': 'Mc Ardles diseaae is due to: \nSelect and explain. \nA. Liver Phosphorylase deficiency, B. Muscle Phosphorylase deficiency, C. Lysosomal alpha-1,4-glucosidase deficiency, D. G6PD Deficency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Muscle Phosphorylase deficiency', 'role': 'assistant'}]