This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Pharmacology
[{'content': 'All of the following are actions produced by mu receptors of morphine except:- \nSelect and explain. \nA. Miosis, B. Decreased GI motility, C. Respiratory depression, D. Hyperalgesia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Actions by u(MU) receptors S sedation A analgesia C constipation R respiratory depression U euphoria M miosis u (Mu) receptors cause analgesia and not hyperalgesia (Increase sensation of pain)', 'role': 'assistant'}]