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 positive in \na. Restrictive cardiomyopathy \nb. Constrictive pericarditis \nc. Cardiac tamponade \nd. Dilated cardiomyopathy \ne. Pneumothorax \nSelect and explain. \nA. a,b,e, B. a,b, C. a,c,d,e, D. a,b,c,d,e", 'role': 'user'}, {'content': "Answer: B \nExplanation: Kussmaul's sign is rise in JVP with inspiration.\xa0 It is seen in constrictive pericarditis\xa0 and Restrictive cardiomyopathy.", 'role': 'assistant'}]