This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'ContinouCo murmur is found in all, except \nSelect and explain. \nA. Mitral stenosis with mitral regurgitation, B. Patent ductus aeriosus, C. Rupture of sinus of valsalva, D. Systemic aeriovenous fistula', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref Harrison 19 th ed pg 1449 The classic example of a continuous murmur is that associated with a PDA, which usually is heard in the second or third interspace at a slight distance from the sternal border. Other causes of a continuous murmur include a ruptured sinus of Valsalva aneurysm with creation of an aoic-right atrial or right ventricular fistula, a cor- onary or great vessel aeriovenous fistula, and an aeriovenous fistula constructed to provide dialysis access', 'role': 'assistant'}]