<prompt> Closure of glottis is by all exceptPosterior cricoarytenoidLateral cricoarytenoidCricothyroidThyroarytenoid  <response>: Posterior cricoarytenoid acts by abducting vocal cords. Lateral cricoarytenoid and Thyroarytenoids are adductors of vocal cords. Whereas Cricothyroid is tensor of vocal cords. Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 320 