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 statement regarding neuraxial opioids for labor and delivery is \nSelect and explain. \nA. Opioids should never be used as a sole agent, B. Most common side effect is fetal bradycardia, C. Intrathecal morphine is associated with quick peak in concentration and early onset maternal respiratory depression, D. Systemic absorption is similar to intramuscular', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most common side effect of\xa0 opioids is pruritis. Since epidural space contains extensive vascular plexus systemic absorption is similar to intramuscular injection.', 'role': 'assistant'}]