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: Radiology
[{'content': 'The most recent advance in noninvasive cardiac output monitoring is the use of – \nSelect and explain. \nA. PA catheter, B. Thermodilution technique, C. Echocardiography, D. Electrical impedance cardiography technology', 'role': 'user'}, {'content': 'Answer: D \nExplanation: PA catheter & thermodilution technique are invasive procedure.\nEcho is noninvasive old technique to measure cardiac output.\nRecent noninvasive advance to measure C.O. is electrical impedance cardiography technology', 'role': 'assistant'}]