12. Klinefelter's Syndrome.
| a. | is 47, XYY | |
| b. | is associated with severe mental retardation | |
| c. | is associated with hypogonadism | |
| d. | is associated with behavioural immaturity | |
| e. | is associated with gynaecomastia | |
| f. | is associated with infertility | |
| g. | affects 1: 600 males |