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: Medicine
[{'content': "All of the following are seen in cardiac tamponade except- \nSelect and explain. \nA. Pulsus paradoxus, B. Diastolic collapse of right ventricle on echocardiogram, C. Electrical alterans, D. Kussumaul's Sign", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]