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
[{'content': 'All of _the following may be seen in patient of cardiac tamponade except- \nSelect and explain. \nA. raised JVP, B. Hypotension with narrowed pulse pressure, C. muffled hea sounds, D. atrial flutter', 'role': 'user'}, {'content': "Answer: D \nExplanation: Beck's triad is a collection of three medical signs associated with acute cardiac tamponade Components of Beck's Triad Hypotension with a Narrowed Pulse Pressure Jugular Venous Distention Muffled hea Sounds Ref Harrison 20th edition pg 1456", 'role': 'assistant'}]