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': 'Pulse pressure in severe aoic regurgitation is equal to- \nSelect and explain. \nA. 30-45mmHg, B. 45-60mmHg, C. 60-75 mmHg, D. 75-90 mm Hg', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Therefore, a defining characteristic of aoic regurgitation is an increase in aoic pulse pressure (systolic minus diastolic pressure). ... Early in the course of regurgitant aoic valve disease, there is a large increase in left ventricular end-diastolic pressure and left atrial pressure.pulse pressure usually between 75-90 mm/hg Ref Davidson 23rd edition pg 450', 'role': 'assistant'}]