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: Unknown
[{'content': 'The following data were obtained from a man weighing 70 kg\n• Aorta oxygen (O2) content = 20.0 vol%\n• Femoral vein O2 content = 16 vol%\n• Coronary sinus O2 content = 10 vol%\n• Pulmonary artery O2 content = 15 vol%\n• Total body O2 consumption = 400 ml/min \nwhat is the cardiac output of this man? \nSelect and explain. \nA. 10 L/min, B. 5 L/min, C. 5 L/min, D. 8 L/min', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The Fick equation is a useful method for measuring cardiac output or flow through any organ when the oxygen (O2) consumption and the difference between arterial and venous O2 content (vol% = ml/100ml) is known.\nFlow = O2 consumption /\xa0 arterial (O2 content – venous O2 content)\nCardiac output = O2 consumption / (aorta O2 – pulmonary artery O2)\n= 400 / (20 – 15)\n= 8 L/min', 'role': 'assistant'}]