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
Most common Glycogen storage disorder to be present in adolescents is? 
Select and explain. 
A. Mc Ardle disease, B. Cori disease, C. Andersen disease, D. Von Gierke disease
A: Mc Ardle disease
Answer: A: Mc Ardle disease 
Explanation: Mc Ardle disease (Type V GSD) due to muscle phosphorylase deficiency is the most common GSD to present in adolescents & adults.