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 is P-Glycoprotein inhibitor \nSelect and explain. \nA. Rifampicin, B. Phenytoin, C. Griseofulvin, D. Ketoconazole', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Drugs like cyclosporine, tacrolimus, quinidine, diltiazem, verapamil, itraconazole, ketoconazole, amiodarone inhibit P-Glycoprotein and cause drug toxicity.', 'role': 'assistant'}]