This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Pathology
[{'content': '16-year-old girl with sho height, amenorrhea with widely spaced nipple. Karyotyping is; \nSelect and explain. \nA. 45 X0, B. 46 XO, C. 47 XXX, D. 46XY', 'role': 'user'}, {'content': "Answer: A \nExplanation: Given features suggests the diagnosis of Turner's syndrome. Turner's syndrome Most common sex chromosomal disorder in phenotypic females. Results from complete or paial loss of one X chromosome (45, XO) Features: Sho stature Coarctation of aoa Cubitus valgus Streak ovaries, infeility, amenorrhea Peripheral lymphedema at bih Low posterior hairline Webbing of neck Broad chest and widely spaced nipples", 'role': 'assistant'}]