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
Mc Ardles diseaae is due to: 
Select and explain. 
A. Liver Phosphorylase deficiency, B. Muscle Phosphorylase deficiency, C. Lysosomal alpha-1,4-glucosidase deficiency, D. G6PD Deficency
B: Muscle Phosphorylase deficiency
Answer: B: Muscle Phosphorylase deficiency 
Explanation: Muscle Phosphorylase deficiency