This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
Which of the following is not a glycogen storage disorder - 
Select and explain. 
A. Lesch Nyhan syndrome, B. Me Ardle's disease, C. Pompe's disease, D. Von-Gierke's disease
A: Lesch Nyhan syndrome
Answer: A: Lesch Nyhan syndrome 
Explanation: Ans. is 'a' i.e., Lesch Nyhan syndrome