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: 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: None