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
Maximum voluntary ventilation is measured for? 
Select and explain. 
A. 30 sec., B. 60 sec., C. 75 sec., D. 120 sec.99.
B: 60 sec.
Answer: B: 60 sec. 
Explanation: Ans. is'b'i.e., 60 sec.(Ref: Guyton 12h/e p. 470]Maximum voluntary ventilation (MW) :It is the maximum amount of air that can be moved into and out of lungs in 1 minute by voluntary effo.It is about 125-170 L/min.