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
16-year-old girl with sho height, amenorrhea with widely spaced nipple. Karyotyping is; 
Select and explain. 
A. 45 X0, B. 46 XO, C. 47 XXX, D. 46XY
A: 45 X0
Answer: A: 45 X0 
Explanation: 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