This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
[{'content': 'Total alveolar ventilation volume (in L/min) is \nSelect and explain. \nA. 1.5, B. 3.5, C. 4.2, D. 5', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) 4.2(Ref: Ganong, 25th ed/p.629)Alveolar ventilation is 4.2L/minAlveolar ventilation = respiratory rate * (tidal volume - dead space) =12(500-150)=4.2L/min', 'role': 'assistant'}]