This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Specific Cytogenetic Disorders, Subject name: Pathology
[{'content': "Trisomy 13 is identified as: \nSelect and explain. \nA. Edward's syndrome, B. Patau's syndrome, C. Down's syndrome, D. Klinefelter's syndrome", 'role': 'user'}, {'content': "Answer: B \nExplanation: Trisomy 13 = Patau's syndrome Trisomy 18 = Edward's syndrome Trisomy 21 = Down's syndrome Extra X chromosome = Klinefelter syndrome( 47 XXY)", 'role': 'assistant'}]