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: Pathology
[{'content': "Which of the following is glycogen storage disorder due to deficiency of myophosphorylase enzyme: \nSelect and explain. \nA. McArdle's disease., B. Alport syndrome., C. Marfan syndrome., D. Ehlers danlos syndrome.", 'role': 'user'}, {'content': "Answer: A \nExplanation: McArdle's disease is also known as glycogenosis type V, which is an inherited glycogen storage disorder due to deficiency of myophosphorylase deficiency.", 'role': 'assistant'}]