**Question:** All are true about ADHD except

A. Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by inattention, hyperactivity, and impulsivity.
B. It primarily affects children and adolescents, though it can persist into adulthood.
C. Symptoms usually appear before the age of 12 years.
D. ADHD is caused by a lack of dopamine neurotransmitters in the prefrontal cortex and striatum.

**Correct Answer:** .

**Core Concept:** ADHD is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity, typically beginning in childhood and affecting both children and adults. The disorder is neurobiological in nature, involving dopamine neurotransmission in the prefrontal cortex and striatum.

**Why the Correct Answer is Right:** The correct answer highlights that ADHD is a disorder affecting neurodevelopment, and its symptoms typically emerge in childhood but can persist into adulthood. The disorder is not caused by a single neurotransmitter deficiency, in this case, dopamine. Dopamine plays a role in the pathophysiology of ADHD, but the exact cause is multifactorial, involving genetic, environmental, and neurodevelopmental factors.

**Why Each Wrong Option is Incorrect:**

A. This option is incorrect because it claims ADHD primarily affects children and adolescents, while the correct answer emphasizes that the disorder can persist into adulthood.

B. This option is incorrect as ADHD is a neurodevelopmental disorder, and the statement "caused by a lack of dopamine neurotransmitters" is incorrect. Dopamine neurotransmission does play a role in ADHD, but attributing the cause to a single neurotransmitter deficiency is misleading.

C. This option is incorrect as ADHD symptoms usually appear before the age of 12 years. The correct answer highlights that symptoms can emerge during childhood.

D. This option is incorrect as it attributes ADHD to dopamine deficiency, while the correct answer stresses the multifactorial nature of ADHD, involving genetic, environmental, and neurodevelopmental factors.

**Clinical Pearl:** Understanding the multifactorial nature of ADHD is crucial, as it helps in recognizing the complexity of the disorder and provides insight into developing a comprehensive treatment plan, which is essential for effective management. Treatment strategies for ADHD often include pharmacological interventions, behavioral therapy, and cognitive-behavioral therapy, targeting different aspects of the disorder and its impact on the individual's life.