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
The given device is used for 
Select and explain. 
A. To monitor depth of anaesthesia, B. To monitor adequacy of paralysis, C. To monitor temperature, D. To monitor expired carbon dioxide
B: To monitor adequacy of paralysis
Answer: B: To monitor adequacy of paralysis 
Explanation: 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.