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: Pediatrics
[{'content': 'Risk of endocarditis among the following is highest in \nSelect and explain. \nA. Ventricular septal defect, B. Patent ductus arteriosus, C. Atrial septal defect, D. Mitral stenosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Risk of endocarditis - Ventricular septal defect > patent ductus arteriosus > Atrial septal defect.', 'role': 'assistant'}]