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
In JVP y descent is absent and X wave is prominent? Thiscsuggests: 
Select and explain. 
A. Restictive cardiomyopathy, B. Cardiac tamponade, C. Constrictive pericarditis, D. Right Ventricular Failure
B: Cardiac tamponade
Answer: B: Cardiac tamponade 
Explanation: Ans. (b) Cardiac tamponadeRef.: Harrison 19th ed. /1573JVP FindingsJVP WavesFindingsConstrictive pericarditisFindingsCardiac tamponadeX waveProminentProminentY waveProminentAbsent