<prompt> Vocal cords are supplied by?External laryngeal nerveInternal laryngeal nerveRecurrent laryngeal nerveVagus nerve  <response>: Ans. c Recurrent laryngeal nerve. Ref. BD Chaurasia, Anatomy, 3rd vol., 3rd ed., 61 The internal laryngeal nerve supplies the mucous membrane of larynx above the level of vocal folds. The recurrent laryngeal nerve supplies below the level of vocal cords. When both recurrent laryngeal nerves are interrupted, vocal folds lie in cadaveric position and phonation is lost completely. When only recurrent laryngeal is paralysed, opposite vocal cord compensates and phonation is possible. 