Which among the following karyotype is characterised by Klinefelter’s syndrome ?

XXY

The correct answer is Option (2) -XXY

The chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes.

Klinefelter’s Syndrome : This genetic disorder is  caused due to the presence of an additional copy of X- chromosome resulting into a karyotype of 47, XXY.

Such an individual has overall masculine development, however, the feminine development (development of breast, i.e., Gynaecomastia) is also expressed. Such individuals are sterile.