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
Most common cause of stridor in infants is: 
Select and explain. 
A. Laryngomalacia, B. Laryngeal cysts, C. Vocal cord polyp, D. None of the above
A: Laryngomalacia
Answer: A: Laryngomalacia 
Explanation: Laryngomalacia is the most common cause of stridor in infants and is also the most common congenital laryngeal abnormality, accounting for approximately 60% of cases.