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': 'The regional anaesthesia technique that would not be expected to provide appropriate analgesic benefit during the first stage of labor is \nSelect and explain. \nA. Lumbar epidural, B. Pudendal nerve block, C. Lumbar sympathetic block, D. Paracervical block', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pudendal nerve block during delivery mitigates somatic pain during second stage of labor.', 'role': 'assistant'}]