Closure of glottis is by all except
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
Posterior cricoarytenoid
Lateral cricoarytenoid
Cricothyroid
Thyroarytenoid
Larynx