This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
The enzyme deficient in Von-Gierke&;s disease is 
Select and explain. 
A. Glucose-6-phosphatase, B. Acid maltase, C. Muscle phosphorylase, D. Liver phosphorylase
A: Glucose-6-phosphatase
Answer: A: Glucose-6-phosphatase 
Explanation: Repeated question