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: Unknown
Proton pump inhibitors suppress gastric add secretion by inhibition of- 
Select and explain. 
A. H+/Cl- ATPase pump, B. H+/ K+ ATPase pump, C. Na/Cl- ATPase pump, D. Na+/K+ ATPase pump
B: H+/ K+ ATPase pump
Answer: B: H+/ K+ ATPase pump 
Explanation: None