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 agents enhances the bioavailability of levodopa in patients with Parkinson's disease : \nSelect and explain. \nA. Amantadine, B. Ropinirole, C. Entacapone, D. Selegiline", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Levodopa metabolized in the body by two enzymes; MAO and COMT. Thus MAO inhibitors like selegiline and COMT inhibitors like entacapone and tolcapone can increase the bioavailability of dopa.', 'role': 'assistant'}]