Which Hereditary Cause of Intellectual Disability Affects Male Children at a Rate

Multiple Choice

Which hereditary cause of intellectual disability affects male children at a rate of about 1 out of every 5000 males with up to three-fourths of individuals with this disorder having hyperactivity and attention disorders?

A) hydrocephaly
B) cretinism
C) phenylketonuria (PKU)
D) fragile X syndrome