What Is the Most Common Inherited Intellectual Disability Worldwide

question 265

Multiple Choice

What is the most common inherited intellectual disability worldwide?

• A) phenylketonuria (PKU)
• B) fragile X syndrome
• C) Down syndrome
• D) sickle-cell anemia

---

Definitions:

Bone Density

A measure of the strength and solidity of bones, often used to diagnose osteoporosis and assess fracture risk.

Physical Activity

Any bodily movement produced by skeletal muscles that requires energy expenditure.

Crepitation

the grating, crackling or popping sounds and sensations experienced under the skin and joints or a crackling sensation due to the presence of air in the subcutaneous tissue.

Bone Spur

A bony growth formed on normal bone, often due to aging or as a response to friction or pressure.