<prompt> Laryngeal web most commonly involves region of:SupraglottitisGlottisSubglottisBoth a and b  <response>: Approximately 75 of laryngeal webs involve glottic region and are mainly situated anteriorly. Supraglottis and subglottis are involved less often. A laryngeal web is due to incomplete recanalisalion of the embryonic larynx. 