**Core Concept**
The child's symptoms are characteristic of Attention Deficit Hyperactivity Disorder (ADHD), a neurodevelopmental disorder characterized by symptoms of inattention, hyperactivity, and impulsivity.

**Why the Correct Answer is Right**
ADHD is a complex disorder with a genetic component, and the symptoms are typically present in multiple settings, including home and school. The child's inattentive and hyperactive behavior is often accompanied by impulsivity, such as interrupting others or blurting out answers. The diagnosis of ADHD requires a comprehensive evaluation, including a physical examination, medical history, and psychological assessment.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not address the child's symptoms. A routine check-up may not reveal any underlying medical condition that could be causing the symptoms, but it is not a comprehensive evaluation.

**Option B:** This option is incorrect because it pathologizes the child's behavior without considering the possibility of ADHD. Labeling a child as "lazy" or "unmotivated" can be stigmatizing and may lead to further distress for the child and family.

**Option C:** This option is incorrect because it focuses on the child's behavior without considering the possibility of an underlying medical condition. A comprehensive evaluation is necessary to rule out other conditions that may be contributing to the symptoms.

**Option D:** This option is incorrect because it suggests that the child's symptoms are solely due to environmental factors, such as lack of parental attention. While environmental factors may contribute to the development and maintenance of ADHD symptoms, they do not fully explain the child's behavior.

**Clinical Pearl / High-Yield Fact**
ADHD is a chronic condition that requires a comprehensive treatment plan, including behavioral therapy, medication, and lifestyle modifications. Early diagnosis and treatment can significantly improve the child's quality of life and academic performance.

**Correct Answer:** B. Consult a pediatric psychiatrist for a comprehensive evaluation and diagnosis.