This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pericardial Disease, Subject name: Medicine
Beck's triad is? 
Select and explain. 
A. Increased heart sound, distended neck veins, hypotension, B. Increased heart sound, distended neck veins, hypertension, C. Muffled heart sound, distended neck veins, hypotension, D. Muffled heart sound, distended neck veins, hypertension
C: Muffled heart sound, distended neck veins, hypotension
Answer: C: Muffled heart sound, distended neck veins, hypotension 
Explanation: Ans. is 'c' i.e., Muffled heart sound, distended neck veins, hypotension Beck s triad is a feature of cardiac tamponadeBeck's triad of cardiac tamponade consists of:o Hypotensiono Soft or absent heart soundso Jugular venous distension