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': 'Cardiac output can be determined by all except \nSelect and explain. \nA. Fick’s principle, B. V/Q ratio, C. Thermodilution, D. Echocardiography', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]