This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System (Histology), Subject name: Anatomy
Clara cells are seen in - 
Select and explain. 
A. Alveoli, B. Bronchus, C. Trachea, D. Bronchiole
D: Bronchiole
Answer: D: Bronchiole 
Explanation: Ans. is 'd' i.e., Bronchioles o Clara cells are small dome shaped cells present in terminal bronchioleo They secrete a protein that lines the small air passages.