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': 'In JVP y descent is absent and X wave is prominent? Thiscsuggests: \nSelect and explain. \nA. Restictive cardiomyopathy, B. Cardiac tamponade, C. Constrictive pericarditis, D. Right Ventricular Failure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Cardiac tamponadeRef.: Harrison 19th ed. /1573JVP FindingsJVP WavesFindingsConstrictive pericarditisFindingsCardiac tamponadeX waveProminentProminentY waveProminentAbsent', 'role': 'assistant'}]