This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Valvular Heart Disease, Subject name: Medicine
[{'content': 'The most common complication of Sub-valvular Aortic Stenosis is - \nSelect and explain. \nA. Aortic Regurgitation, B. Mitral Regurgitation, C. Tricuspid Regurgitation, D. Pulmonary Regurgitation', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Aortic Regurgitation o Aortic regurgitation is the most common complication of subaortic stenosis.o Note that Aortic regurgitation is not a congenital anomaly associated with subvalvular aortic stenosis.# Aortic regurgitation is a complication of subvalvular# The aortic regurgitation appears to be due to thick fibrous tissue on the left ventricular swface of the valve leaflets. The fibrosis is caused by the repetitive trauma from a jet of blood through the stenosis or by the proliferation of the fbroelastic membrane itself.", 'role': 'assistant'}]