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
All the following are seen in cardiac tamponade except 
Select and explain. 
A. Pulsus paradoxus, B. Diastolic collapse in right ventricular on Echocardiogram, C. Electrical alternans, D. Kussmaul's sign
D: Kussmaul's sign
Answer: D: Kussmaul's sign 
Explanation: Ref Harrison 19 th ed pg 1573 Pulsus paradoxus clinically, electrical alternans on ECG and RVDC on Echocardiography are characteristic features of cardiac tamponade.