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: Pharmacology
The surfactant is produced by 
Select and explain. 
A. Type I Pneumocytes, B. Type II Pneumocytes, C. Alveolar macrophages, D. Clara cells
B: Type II Pneumocytes
Answer: B: Type II Pneumocytes 
Explanation: The smaller type II pneumocytes are often more numerous than type I pneumocytes, and they contribute less than 10% of the surface area.Their cytoplasm contains numerous characteristic secretory lamellar bodies. Ultrastructurally, the lamellar bodies are comprised of concentric whorls of the phospholipid-rich membrane, the precursors of alveolar surfactant. “Surfactant is stored in lamellar bodies and secreted in the form of tubular myelinby type II pneumocytes.