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': "Murmur heard in aoic regurgitation is: September 2009 \nSelect and explain. \nA. Continuous murmur, B. Austin flint murmur, C. Crescendo-decrescendo, D. Graham Steele's Murmur", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B: Austin flint murmur Austin Flint Murmur - Presystolic murmur similar to mitral stenosis, heard at cardiac apex. It is caused by regurgitation from Aoa paially narrowing the mitral valve. It is seen in Aoic Insufficiency Graham Steele's Murmur - Early diastolic murmur heard over Erb's Point seen in Pulmonic Insufficiency, secondary to Pulmonary Hypeension and Mitral Stenosis.", 'role': 'assistant'}]