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': 'Kussmauls sign is seen in all except - \nSelect and explain. \nA. Constrictive pericarditis, B. Right vertricular infarct, C. Restictive cardiomyopathy, D. Cardiac tamponade', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]