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
Stimulus for Hering - Breuer's reflex of Respiration is 
Select and explain. 
A. Tidal volume > 1000 ml, B. Tidal volume > 500 ml, C. Tidal volume < 500 ml, D. Tidal volume < 1000 ml
A: Tidal volume > 1000 ml
Answer: A: Tidal volume > 1000 ml 
Explanation: Stimulus for hering - Breuer's reflex is, when tidal volume increase 2 times more than normal i.e, Tidal volume > 1000 ml.