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
[{'content': 'Proton pump inhibitors suppress gastric add secretion by inhibition of- \nSelect and explain. \nA. H+/Cl- ATPase pump, B. H+/ K+ ATPase pump, C. Na/Cl- ATPase pump, D. Na+/K+ ATPase pump', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]