This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'Inspiratory stridor is found in what kind of lesions: \nSelect and explain. \nA. Supraglottic, B. Subglottic, C. Tracheal, D. Bronchus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer A. SupraglotticGenerally, an inspiratory stridor suggests airway obstruction above the glottis.While an expiratory stridor is indicative of obstruction in the lower trachea.A biphasic stridor suggests a glottic or subglottic lesion.', 'role': 'assistant'}]