This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Carbohydrate Metabolism, Subject name: Pediatrics
Which glycogen storage disease (GSD) does not affect muscles? 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type V
A: Type I
Answer: A: Type I 
Explanation: Type I GSD (Von Gierke disease) is a liver glycogenoses i.e. involves liver Type 2 (Pompe disease), type V (McArdles disease) and type VII ( Tarui disease) involves muscles (Muscle Glycogenoses) Type 3 GSD (Cori's disease) is predominantly a liver glycogenoses but skeletal muscle involvement may also be seen.