This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
[{'content': 'Large PDA leads to: \nSelect and explain. \nA. Endocardial valvulitis, B. Essenmenger syndrome, C. Heart failure, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: d. All of above(Ref: Nelson's 20/e p 2189-2191, Ghai 8/e p 413-414)Complications of large PDA are Cardiac failure; Infective endarteritis, Pulmonary or systemic emboli, Pulmonary hypertension (Eisenmenger syndrome)", 'role': 'assistant'}]