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: Pathology
[{'content': "Most common aneuploidy compatible with life is \nSelect and explain. \nA. Down syndrome, B. Turner syndrome, C. Klinefelter's syndrome, D. Patau syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A, Down syndromeMost common aneuploidy in which infant can survive is trisomy-21 (Down syndrome)', 'role': 'assistant'}]