This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
Most common cause of stridor in children is 
Select and explain. 
A. Laryngomalacia, B. Congenital laryngeal paralysis, C. Foreign body in larynx, D. Congenital laryngeal tumors
A: Laryngomalacia
Answer: A: Laryngomalacia 
Explanation: The most common cause of stridor in children is Laryngomalacia. Laryngomalacia is due to excessive flaccidity of supraglottic larynx which is sucked during inspiration. It manifests at bih or soon after and usually disappear by 2 years of age. Re: Textbook of Ear, Nose and Throat, Dhingra, 7th Edition; Pg no: 333