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': 'Which of the following proton pump inhibitor has enzyme inhibitory activity \nSelect and explain. \nA. Rabeprazole, B. Lansoprazole, C. Pantoprazole, D. Omeprazole', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Omeprazole inhibits oxidation of\xa0certain drugs like diazepam, phenytoin and warfarin levels may be increased. Clarithromycin\xa0inhibits omeprazole metabolism and increases its\xa0plasma concentration.', 'role': 'assistant'}]