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: ENT
[{'content': 'Following total thyrordectory the patient duclops respiratory stridor cause is \nSelect and explain. \nA. B/L recurrent laryngeal nerve palsy, B. B/L complete palsy, C. U/L recurent laryngeal nerve palsy, D. U/L complete palsy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]