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
True statement regarding cardiac tamponatea) Kussumal sign positiveb) Enlargement of the cardiac silhouettec) Promenent y descentd) Electrical alternanse) Muffled heart sounds 
Select and explain. 
A. abc, B. ade, C. ace, D. bde
D: bde
Answer: D: bde 
Explanation: None