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': 'Which one of the following does not produce cyanosis in the first year of life – \nSelect and explain. \nA. Atrial septal defect, B. Hypoplastic left heart syndrome, C. Truncus arteriosus, D. Double outlet right ventricle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]