Axel has a sex chromosome abnormality.He has severe mental retardation and shows some evidence of repetitive self-stimulatory behaviour.Based on this description,what disorder does Axel have?

Question

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Fragile-X syndrome is a sex chromosome abnormality that results in intellectual disability and repetitive self-stimulatory behavior. Supermale (A) is a rare condition in which a male has an extra Y chromosome, but this typically results in normal intellectual functioning. Turner's syndrome (C) is a condition in which a female is missing one X chromosome and can result in intellectual disability, but repetitive behavior is not a defining characteristic. Klinefelter's syndrome (D) is a condition in which a male has an extra X chromosome and can result in some developmental delays, but severe intellectual disability and repetitive behavior are not typically seen.

Axel Has a Sex Chromosome Abnormality