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
McArdle’s disease is caused due to deficiency of 
Select and explain. 
A. Glucose-6-phosphatase, B. Muscle (Myo) Phosphorylase, C. Lysosomal glucosidase, D. Microsomal Pi transporter
B: Muscle (Myo) Phosphorylase
Answer: B: Muscle (Myo) Phosphorylase 
Explanation: None