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: Physiology
Over-inflation of the lung is prevented by? 
Select and explain. 
A. Chemo-receptor, B. Hering- Breuer reflex, C. Surfactant, D. Clara cells
B: Hering- Breuer reflex
Answer: B: Hering- Breuer reflex 
Explanation: • Hering- Breuer reflex is reflex triggered to prevent over inflation of lung.
• Smooth muscles of the lung have pulmonary stretch receptors which respond to excessive stretching of the lung during large inspirations.
• The reflex limits the tidal volume while increasing the respiratory frequency
• Hering Breuer inflation reflex increases in duration of expiration produced by steady lung inflation.
• Hering breur deflation reflex is a decrease in the duration of expiration produced by steady lung deflation.
• Surfactant prevents the collapse of the lung.