This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, 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 and esomoprazole are microsomal anzymes inhibitors .these may decrease the metabolism of diazepam. Lansoprazole enhances the metabolism of theophyllin .(katzung 11/e p1075)', 'role': 'assistant'}]