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
[{'content': '30 year old male comes with h/o acute breathlessness. JVP ↑ sed inspiratory fall of BP by 14 mmHg true about this condition-a) Kussmaul signb) Low electric ECGc) Rapidly discentd) Inspiratory fall of systemic fall of more than 10 mmHg \nSelect and explain. \nA. c, B. d, C. bd, D. ac', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]