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 given device is used for \nSelect and explain. \nA. To monitor depth of anaesthesia, B. To monitor adequacy of paralysis, C. To monitor temperature, D. To monitor expired carbon dioxide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The device shown is a peripheral nerve stimulator, which delivers train of four stimulus to peripheral nerve (ulnar nerve) to assess adequacy of muscle relaxation.', 'role': 'assistant'}]