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
Type VI glycogen storage disease is due to the deficiency of - 
Select and explain. 
A. Muscle phosphorylase, B. Glucose-6-phosphatase, C. Liver phosphorylase, D. Branching enzyme
C: Liver phosphorylase
Answer: C: Liver phosphorylase 
Explanation: The Type VI glycogen is also called as Her's disease and it is caused by enzyme defect liver phosphorylase.