<prompt> A patient presented with stridor and dyspnoea which he developed after an attack of upper respiratory tract infection. On examination he was found to have a 3-mm glottic opening. All of the following are used in the management except:TracheostomyArytenoidectomyTeflon injectionCordectomy  <response>: Stridor and dyspnoea are the result of narrowed airway which would require widening. Choices a, b and d will provide airway. Teflon injection is used to medialise the cord in vocal cord paralysis. It will further narrow the glottis. 