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
The feature of JVP in cardiac tamponade is: 
Select and explain. 
A. Prominent x descent with prominent 'y'descent, B. Prominent x descent with absent 'y' descent, C. Absent x descent with prominent 'y' descent, D. Absent x descent with absent 'y' descent
B: Prominent x descent with absent 'y' descent
Answer: B: Prominent x descent with absent 'y' descent 
Explanation: B i.e. Prominent X descent with absent 'Y' descent