Which of the following is an example of a functional behavioral disorder?

• A. Alzheimer's disease
• B. Schizophrenia
• C. Multiple sclerosis
• D. Attention-deficit/hyperactivity disorder (ADHD)

Answer: (D)

Verified step by step guidance

1. Understand the difference between functional and organic behavioral disorders. Functional disorders are those without a clear physical or structural brain abnormality, often related to psychological or developmental factors.
2. Review the options given: Alzheimer's disease and multiple sclerosis are organic disorders because they involve physical changes in the brain or nervous system.
3. Schizophrenia, while complex, is generally considered a functional disorder because it primarily involves psychological symptoms without a clearly identifiable structural brain lesion.
4. Attention-deficit/hyperactivity disorder (ADHD) is classified as a functional behavioral disorder because it involves behavioral symptoms related to attention and hyperactivity without a known physical brain damage.
5. Therefore, identify ADHD as the example of a functional behavioral disorder among the options, based on its psychological and developmental nature rather than organic brain pathology.