Klinefelter's syndrome 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 is also expressed. Such individuals are sterile. Thus, statement B and E are correct regarding Klinefelter's syndrome. Statement A, C and D are incorrect w.r.t. Klinefelter's syndrome as they are associated with Down's syndrome.