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': 'M.C. nerve used for monitoring during anaesthesia – \nSelect and explain. \nA. Ulnar nerve, B. Facial nerve, C. Radial nerve, D. Median nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In anaesthetic practice neuromuscular block monitored recording contractile responses of thumb muscle (adductor pollicis) to transcutaneous ulnar nerve stimulation. Facial nerve stimulation of orbicularis oculi is the second most common.', 'role': 'assistant'}]