This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Opioids, Subject name: Pharmacology
[{'content': 'An opioid which is an anti tussive action is? \nSelect and explain. \nA. Dextromethorphan, B. Oxeladin, C. Codeine, D. Narcotine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) Codeine REF: KDT 5th ed p. 197ANTITUSSIVESOpioidsNon opioidsCodeinePholocodieneNoscapine or narcotineDextrpmethorphanOxeladin chlorphdianol', 'role': 'assistant'}]