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': 'Which of the following lesions is not a common cause for vegetation formation in the hea ? \nSelect and explain. \nA. AS, B. MS, C. MR, D. ASD', 'role': 'user'}, {'content': 'Answer: D \nExplanation: There is low flow and turbulence in ASD, so risk of vegetation formation and infective endocarditis is low.', 'role': 'assistant'}]