<prompt> True about klinefelter syndrome isHeight arm spanKaryotype 45 x 0Testis and sperm count are normalPubey is attained at normal age  <response>: Answer- D. Pubey is attained at normal ageKLINEFELTER SYNDROMEKlinefelter syndrome is the most common chromosomal disorder associated with male hypogonadkm anit infeitity.It is defined classically by a 47, XXY karyotype with variants demonstrating additional X and Y chromosomes.Pathophysiology:The addition of more than 1 extra X or Y chromosome to a male karyotypeSexual characteristics-Patients may lack secondary sexual characterstics because of a decrease in androgen production. This results in sparse facial bodysexual hair, a high-pitched voice. They have eunuchoid body habitus.Testicular dysgenesis small firm testis, testis size 10 mL may be present in postpubeal patients. Infeilityazoospermia may result from atrophy of the seminifercous tubules. Infeility is seen in practically all individuals with a 47 XXY karyotype. Patients with Klinefelter syndrome mosaicism 46,XY 47,XXY can be feile. 