A 25-year-old woman with amenorrhea has never had menarche. On physical examination, she is 145 cm (4 ft, 9 in) tall. She has a webbed neck, a broad chest, and widely spaced nipples. Strong pulses are palpable in the upper extremities, but there are only weak pulses in the lower extremities. On an abdominal MR imaging, the ovaries are, the ovaries are small, elongated, and tubular. Which of the following karyotypes is most likely to be present in this patient?

• 45,X/46,XX
• 46,X,X(fra)
• 47,XXY
• 47,XXX

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