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': 'Continuous murmur is found in all, EXCEPT \nSelect and explain. \nA. Mitral stenosis with mitral regurgitation, B. Patent ductus arteriosus, C. Rupture of sinus of Valsalva, D. Systemic arteriovenous (AV) fistula', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]