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: Biochemistry
Gluconic acid formation requires which enzyme ? 
Select and explain. 
A. Glucose oxidase, B. Glucose dehydrogenase, C. Glucokinase, D. Glucose dehydratase
A: Glucose oxidase
Answer: A: Glucose oxidase 
Explanation: Glucose oxidase