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': 'Cardiac tamponade is characterised by all except \nSelect and explain. \nA. Irregular pulse, B. Hypotension, C. Reduced pulse pressure, D. Pulsus paradoxus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Irregular pulse is not seen in Cardiac tamponade. *Clinical features of Cardiac tamponade : Dyspnoea, collapse, Tachycardia, Hypotension, gross elevation of JVP, soft hea sound with an early third hea sound, Pulsus paradoxus, kussmaul's breathing. Reference : Davidson, 23rd Edition, page no : 544.", 'role': 'assistant'}]