This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hea Sounds, Subject name: Medicine
[{'content': 'Which of the following is a cause of wide pulse pressure? \nSelect and explain. \nA. Aoic stenosis, B. Aoic regurgitation, C. Mitral stenosis, D. Tricuspid stenosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pulse pressure= SBP - DBP. Aoic stenosis or Mitral stenosis- SBP is low leading to reduction of pulse pressure. Tricuspid stenosis -Blood flow into right side of hea is reduced, so left side inflow is reduced-Reduction in SBP. Changes in Pulse Pressure Include: Increased Pulse pressure: Aoic Regurgitation, A-V shunt Decreased Pulse pressure: Aoic Stenosis, Mitral Stenosis Decreased Diastolic pressure: Aoic Regurgitation, Patent Ductus Aeriosus', 'role': 'assistant'}]