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
[{'content': 'Maximum voluntary ventilation is measured for? \nSelect and explain. \nA. 30 sec., B. 60 sec., C. 75 sec., D. 120 sec.99.', 'role': 'user'}, {'content': "Answer: B \nExplanation: 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.", 'role': 'assistant'}]