This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Na/K pump which enzyme is used 
Select and explain. 
A. ATPase, B. GTPase, C. Acetyl CoA, D. NADPH
A: ATPase
Answer: A: ATPase 
Explanation: Example of ATPases is sodium-potassium adenosine triphosphatase (Na, K ATPase), which is also known as the Na, K pump. Na, K ATPase catalyzes the hydrolysis of ATP to adenosine diphosphate (ADP).(REF.GANONG'S REVIEW OF MEDICAL PHYSIOLOGY -23rd EDITION.Page No-46,47)