<prompt> Most common nerve injured by ligation of sup thyroid artery -RLNFacial N.Mandibular M.Auditory N.  <response>: Ans. is a i.e., RLN o Recurrent laryngeal nerve RLN may be damaged during superior thyroid artery- ligation. Most common nerve injured by ligation of 1. Sup thyroid artery- Recurrent laryngeal nerve and 2. Inferior thyroid artery- Superior laryngeal nerve 