ENT Stridor is caused by A Obstruction of the airway below the level of larynx B Obstruction of the airway at the level of larynx C Obstruction of the airway above the level of larynx D Obstruction of the airway above the level of trachea 💡 Explanation Stridor is caused by ✓ Correct Answer: D. Obstruction of the airway above the level of trachea