This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': "All the following are seen in cardiac tamponade except \nSelect and explain. \nA. Pulsus paradoxus, B. Diastolic collapse in right ventricular on Echocardiogram, C. Electrical alternans, D. Kussmaul's sign", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref Harrison 19 th ed pg 1573 Pulsus paradoxus clinically, electrical alternans on ECG and RVDC on Echocardiography are characteristic features of cardiac tamponade.', 'role': 'assistant'}]