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: Surgery
[{'content': 'After thyroidectomy cadeveric position of vocal cords are due to: \nSelect and explain. \nA. Unilateral recurrent laryngeal nerve paralysis., B. Bilateral recurrent laryngeal nerve paralysis., C. Unilateral external laryngeal nerve paralysis., D. Bilateral external laryngeal nerve paralysis.', 'role': 'user'}, {'content': "Answer: B \nExplanation: In case of bilateral recurrent laryngeal nerve paralysis, the vocal cords will be motionless, lying in a 'cadaveric position'. Immediate tracheostomy is the life-saving measure.", 'role': 'assistant'}]