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
[{'content': 'Most common Glycogen storage disorder to be present in adolescents is? \nSelect and explain. \nA. Mc Ardle disease, B. Cori disease, C. Andersen disease, D. Von Gierke disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mc Ardle disease (Type V GSD) due to muscle phosphorylase deficiency is the most common GSD to present in adolescents & adults.', 'role': 'assistant'}]