Which of the following is NOT commonly associated with Intellectual Disability?

Intellectual Disability (ID) is characterized by significant limitations in intellectual functioning and adaptive behavior. The conditions listed in the question are all genetic or developmental disorders that have been associated with ID, except for sudden onset anxiety.

Tay-Sachs, Down syndrome, and Fragile X syndrome all have documented links to intellectual disabilities. Tay-Sachs disease is a genetic disorder that results in the destruction of nerve cells in the brain and spinal cord, leading to cognitive decline. Down syndrome, caused by an extra chromosome 21, often results in mild to moderate intellectual disability alongside physical characteristics. Fragile X syndrome, a genetic condition caused by a mutation on the X chromosome, is a leading cause of inherited intellectual disability.

In contrast, sudden onset anxiety is not typically classified as a developmental disorder or a condition that leads to reduced intellectual functioning. Instead, it manifests as an acute anxiety reaction, often triggered by specific stressors or life events, and does not inherently impair cognitive abilities or functioning in the way that the other conditions do. Hence, this disconnection from the concept of intellectual disability makes sudden onset anxiety the correct choice as something not commonly associated with ID.