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: Pharmacology
[{'content': 'Esomeprazole acts by inhibiting \nSelect and explain. \nA. H+Na+ ATPase pump, B. H+ pump, C. H+K+ ATPase pump, D. Any of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Esomeprazole is an example of proton pumb inhibitor', 'role': 'assistant'}]