AP EAMCET Medical 23 Apr 2019 Shift 2 Paper

Study the following statements
I) Karyotype of Klinefelter's syndrome is AA + XO
II) Turner's syndrome is an example for trisomy
III) AA + XX + 21st chromosome is the karyotype of Down's syndrome
IV) Individual with Klinefelter's syndrome is Barr body positive
Among the above, correct statements are