A 14-year-old boy has difficulty expressing himself in writing and makes frequent spelling mistakes, does not follow instructions and cannot wait for his turn while playing a game. He is likely to be suffering from
**Core Concept**
The question is assessing the clinical presentation of Attention Deficit Hyperactivity Disorder (ADHD), a neurodevelopmental disorder characterized by symptoms of inattention, hyperactivity, and impulsivity. ADHD is typically diagnosed in childhood and can have a significant impact on an individual's academic, social, and occupational functioning.
**Why the Correct Answer is Right**
The boy's symptoms, such as difficulty expressing himself in writing, frequent spelling mistakes, not following instructions, and difficulty waiting for his turn, are classic signs of inattention, a core symptom of ADHD. Inattention is characterized by symptoms such as disorganization, forgetfulness, and difficulty sustaining attention during tasks or activities. The boy's symptoms are likely due to impaired functioning of the prefrontal cortex, a region of the brain responsible for executive function, working memory, and attention regulation.
**Why Each Wrong Option is Incorrect**
* **Option A:** Oppositional Defiant Disorder (ODD) is a separate neurodevelopmental disorder characterized by a pattern of negative, hostile, and defiant behavior, but it does not typically present with symptoms of inattention or hyperactivity.
* **Option B:** Learning Disability is a term that encompasses a range of disorders that affect an individual's ability to learn and process information, but it is not a specific diagnosis that encompasses the range of symptoms presented by the boy.
* **Option D:** Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder characterized by symptoms of social communication and interaction difficulties, as well as restricted and repetitive patterns of behavior, but it does not typically present with symptoms of inattention or hyperactivity.
**Clinical Pearl / High-Yield Fact**
ADHD is often underdiagnosed and undertreated, particularly in girls and women, who may present with more internalizing symptoms such as anxiety and depression rather than the classic symptoms of inattention and hyperactivity.
**Correct Answer: C. Attention Deficit Hyperactivity Disorder (ADHD)**