<prompt> Tracheostomy indication is:Vocal cord replacementPharynx replacementTracheomalaciaForeign body obstructing airway  <response>: Indications of tracheostomy: 1- Upper respiratory tract obstruction; Laryngeal, supralaryngeal ,and tracheal causes. Causes of stridor 2- Lower respiratory tract obstruction: Secretory obstruction, Wet lung syndrome. ref: hazarika 4th ed 