<prompt> A 57 year old female underw ent total theroidectomy. Following the surgery she developed stridor and dyspoea. The possible cause is -Bilateral superior laryngeal nerve injuryUnilateral superior laryngeal nerve injuryBilateral recurrent laryngeal nerve injuryUnilateral recurrent laryngeal nerve injury  <response>: 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 