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: Anaesthesia
[{'content': 'True about epidural narcotics (opioids) are all except \nSelect and explain. \nA. Nausea, vomiting (gi side effects), B. Pruritis (itching), C. Respiratory depression, D. Act on dorsal horn cells', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Act on dorsal horn cells', 'role': 'assistant'}]