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: Physiology
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: None