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': 'Large PDA (Patent ductus arteriosus) leads to – \nSelect and explain. \nA. Endocardial valvulitis, B. Eisenmenger syndrome, C. CHF, D. All of above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Endocardial valvulitis (infective endocarditis), CHF and Eisenmenger syndrome, all can develop in PDA.', 'role': 'assistant'}]