This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, 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: Entacapone & tolacapone which cones under COMT INHIBITORS enhance & prolong the therapeutic effect of levodopa-carbidopa in advanced & fluctuating PD . Ref: KD Tripathi 8th ed.', 'role': 'assistant'}]