This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
In a preterm baby with respiratory distress syndrome which type of cell is deficient 
Select and explain. 
A. Type 1 alveolar cell, B. Type 2 alveolar cell, C. Alveolar capillary endothelial cells, D. Bronchial mucosal epithelial cells
B: Type 2 alveolar cell
Answer: B: Type 2 alveolar cell 
Explanation: After bih Lung expands due inspiring air surfactant keeps the bug from collapsing defficieney of surfactant= Respiratory Distress Syndrome ref : guyton and hall 13th ed.