The karyotype of a person with Turner's syndrome is:

44 + XO

The correct answer is Option (2) → 44 + XO

Turner’s Syndrome : Such a disorder is caused due to the absence of one of the X chromosomes, i.e., 45 with XO, Such females are sterile as ovaries are rudimentary besides other features including lack of other secondary sexual characters. The karyotype for Turner's syndrome is 44 + XO, indicating 44 autosomes and one X chromosome, with the absence of a second sex chromosome.