This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics of Common Disorders, Subject name: Pediatrics
[{'content': "Turner's syndrome karyotyping is - \nSelect and explain. \nA. XXY, B. XO, C. XXX, D. Trisomy 21", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., XOTrisomy 13- Patau syndromeTrisomy 18- Edward syndromeTrisomy 21- Down syndromeXO- Turner syndromeXXY- Klinefelter syndrome", 'role': 'assistant'}]