<prompt> Which of the following are true -a Tracheo-bronchial cartilage is fibrousb Thyroid cartilage is hyalinec Cricoid cartilage is hyalined Corniculate cartilage is elastice Epiglottis cartilage is elasticbceabdbcdeacde  <response>: Tracheobronchial cartilage is hyaline cartilage. 