<prompt> Safety muscle of larynx is:AryepiglotticusCricoarytenoidThyroarytenoidPosterior cricoarytenoid  <response>: Ans. D Posterior cricoarytenoidRef: Dhingra, 5thpg. 300 Posterior cricoarytenoid is the most important muscle of the larynx as it is the only abductor of vocal cord. Paralysis of posterior cricoarytenoid will lead to adduction of vocal cord, which may lead to dyspnea resulting in death. 