<prompt> All are common causes of stridor except:Foreign body in larynx and tracheaLaryngomalaciaAtrophic laryngitisMultiple papillomas of larynx  <response>: c. Atrophic laryngitisRef: Nelsons 20e p 2113-2116Atrophic Laryngitis usually manifests with hoarseness irritable cough; Rest 3 conditions can manifest as stridor. 