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': 'Cilastatin is combined with which of the following to increase its duration? \nSelect and explain. \nA. Carbenicillin, B. Cefoperazone, C. Imipenem, D. Penicillin G', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cilastatin inhibits renal dihydropeptidase enzyme that metabolizes Imipenem.', 'role': 'assistant'}]