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': 'Calculate alveolar ventilation per minute of a patient with respiratory rate of 12/min, tidal volume is 500ml. \nSelect and explain. \nA. 6 L / min, B. 4.8 L / min, C. 4.2 L / min, D. 4 L / min', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Alveolar Ventilation\n= (Tidal volume - Dead space) X Respiratory rate\n= (500 - 150) X 12\n= 350 X 12\n= 4.2 L / min', 'role': 'assistant'}]