This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surgical Approaches to the Thyroid, Subject name: Surgery
[{'content': 'A 57 year old female underw ent total theroidectomy. Following the surgery she developed stridor and dyspoea. The possible cause is - \nSelect and explain. \nA. Bilateral superior laryngeal nerve injury, B. Unilateral superior laryngeal nerve injury, C. Bilateral recurrent laryngeal nerve injury, D. Unilateral recurrent laryngeal nerve injury', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Bilateral recurrent laryngeal nerve injury Post thyroidectomy nerve injuriesUnilateral recurrent laryngeal nerve injuryHoarseness of voiceBilateral recurrent laryngeal nerve injuryAdduction of vocal cords- difficulty in breathingsuperior laryngeal nerve injuryLoss of pitch in voice", 'role': 'assistant'}]