This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pediatrics
If a 5-year-old child suddenly develops stridor, which one of the following would be the most likely diagnosis 
Select and explain. 
A. Laryngomalacia, B. Acute laryngo-tracheobronchitis, C. Foreign body aspiration, D. Acute epiglottitis
C: Foreign body aspiration
Answer: C: Foreign body aspiration 
Explanation: Foreign body is a potential cause of stridor in children.Foreign body aspirated more are food and coins.Treatment consists of endoscopic visualisaion and removal by an experienced surgeon. Ref : Essential pediatrics,O.P.Ghai,7th edition,pg np:341