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
Which of the following is glycogen storage disorder due to deficiency of myophosphorylase enzyme: 
Select and explain. 
A. McArdle's disease., B. Alport syndrome., C. Marfan syndrome., D. Ehlers danlos syndrome.
A: McArdle's disease.
Answer: A: McArdle's disease. 
Explanation: McArdle's disease is also known as glycogenosis type V, which is an inherited glycogen storage disorder due to deficiency of myophosphorylase deficiency.