This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Closure of glottis is by, all except - 
Select and explain. 
A. Posterior cricoarytenoids, B. Lateral cricoarytenoids, C. Cricothyroid, D. Thyroarytenoids
A: Posterior cricoarytenoids
Answer: A: Posterior cricoarytenoids 
Explanation: Muscles which adduct the vocal cords (close the glottis) are thyroarytenoid, lateral cricoarytenoid, Interarytenoid (Transverse arytenoid), Cricothyroid.