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
Which of the following is a cause of wide pulse pressure? 
Select and explain. 
A. Aoic stenosis, B. Aoic regurgitation, C. Mitral stenosis, D. Tricuspid stenosis
B: Aoic regurgitation
Answer: B: Aoic regurgitation 
Explanation: 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