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': 'False regarding Austin-Flint murmur is: March 2009 \nSelect and explain. \nA. Systolic murmur, B. Severe aoic regurgitation, C. Originates at anterior mitral valve leaflet, D. May be confused with Murmur of mitral stenosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Systolic murmur Austin-flint murmur is a mid-diastolic/presystolic murmur heard in chronic severe AR. The diastolic murmur mimics mitral stenosis and is attributed to mitral valve leaflet vibration or mild obstruction caused by rapid regurgitant flow both from the aoic root and the left atrium.', 'role': 'assistant'}]