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: Anatomy
Hyaline cartilage of respiratory tree extends upto- 
Select and explain. 
A. Tertiary bronchiole, B. Secondary bronchiole, C. Terminal bronchiole, D. Bronchi
D: Bronchi
Answer: D: Bronchi 
Explanation: The trachea and bronchi have cartilage (hyaline cartilage) in their walls but relatively little smooth muscles.
The walls of bronchiole and terminal bronchioles do not contain cartilage instead, they contain more smooth muscles.