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
Volume of air taken in and given out during normal respiration is referred to as: 
Select and explain. 
A. IRV, B. TV, C. ERV, D. VC
B: TV
Answer: B: TV 
Explanation: B i.e. T V