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': "Kussmaul's sign is seen in all of the following, except: \nSelect and explain. \nA. Restrictive cardiomyopathy, B. Right ventricular infarction, C. Constrictive pericarditis, D. Cardiac tamponade", 'role': 'user'}, {'content': "Answer: D \nExplanation: Kussmaul's sign is defined by either a rise or a lack of fall of the JVP with inspiration and is classically associated with constrictive pericarditis. It is also seen in patients with restrictive cardiomyopathy, massive pulmonary embolism, right ventricular infarction, and advanced left ventricular systolic hea failure. Ref: Harrison's Internal Medicine, 18th Edition, Pages 1823, 1972-74", 'role': 'assistant'}]