All are common causes of stridor except:
c. Atrophic laryngitis(Ref: Nelson's 20/e p 2113-2116)Atrophic Laryngitis usually manifests with hoarseness & irritable cough; Rest 3 conditions can manifest as stridor.
Foreign body in larynx and trachea
Laryngomalacia
Atrophic laryngitis
Multiple papillomas of larynx
Respiratory System