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': 'All are true about ramelteon except \nSelect and explain. \nA. Agonist at MT1 and MT2 receptors, B. Is a substrate of CYP1A2, C. Has high addiction liability, D. Approved for treatment of insomnia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: All are true for ramelteon except the statement that it has high addiction liability, in clinical trials on chronic insomnia patients, continuous nightly treatment with ramelteon maintained its effect to shoen sleep latency & was found to be free of rebound phenomenon on stoppage .No dependence producing potential has been noted so far. Ref KD Tripathi 8th ed.', 'role': 'assistant'}]