This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
In lung, true about Hyaline membrane disease 
Select and explain. 
A. FRC is smaller than closing volume, B. FRC is larger than closing volume, C. FRC is equal to closing volume, D. FRC doesn't depend on closing volume
A: FRC is smaller than closing volume
Answer: A: FRC is smaller than closing volume 
Explanation: A breathing disorder in newborns caused by immature lungs. Neonatal respiratory distress syndrome (NRDS) is more common in premature babies born six weeks or more before their due dates. It usually develops within the first 24 hours after bih Ref: guyton and hall textbook of medical physiology 12 edition page number:320,321,322