<prompt> External laryngeal nerve supplies which muscle?CricothyroidThyroarytenoidCricoarytenoidVocalis  <response>: ANSWER: A Cricothyroid REF: Dhingras 4 ed p. 318 Superior laryngeal nerve: arises from the inferior ganglion of the vagus Divides into external and internal branches. External laryngeal nerve supplies cricothyroid Internal laryngeal nerve pierces the thyrohyoid membrane and gives sensory supply to larynx and hypopharynx. 