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
Pneumocytes are cells found in epithelial lining of: 
Select and explain. 
A. Alveoli, B. Bronchus, C. Trachea, D. Bronchioles
A: Alveoli
Answer: A: Alveoli 
Explanation: PneumocytesTwo types of pneumocytes contribute to the maintenance of the alveoli of the lungsType I pneumocytes and Type II pneumocytes.These cells function to aid in gas exchange, secretion of pulmonary surfactant, and self-regeneration