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
Kussumaul's sign is most commonly seen in 
Select and explain. 
A. Restrictive cardiomyopathy, B. Pericardial tamponade, C. Constrictive pericarditis, D. Right ventricular infarct
C: Constrictive pericarditis
Answer: C: Constrictive pericarditis 
Explanation: None