This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'KussmauPs sign is a feature of pericarditis with which of the following? \nSelect and explain. \nA. Cardiac tamponade, B. Constrictive pericarditis, C. Restrictive cardiomyopathy, D. Pericardial effusion', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. b (Constrictive pericarditis). (Ref. Harrison, Medicine, 18th/Ch. 239)CONSTRICTIVE PERICARDITIS (THICK, CALCIFIED PERICARDIUM)# Prominent X and Y descent (Freidrich's sign prominent 'Y' descent)# Kussmaul's sign# Low voltage ECG# Electrical alternans# Small RV size# Absent pulsus paradoxus", 'role': 'assistant'}]