Closure of glottis is by all except: (A) Posterior cricoarytenoid, (B) Lateral cricoarytenoid, (C) Cricothyroid, (D) Thyroarytenoid
Answer is A. 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