**Question:** A 16 year old boy does not attend school because of the fear of being harmed by school mates. He thinks that his classmates laugh at and talk about him. He is even scared of going out to the market. He is most likely suffering from :

1. **Core Concept:** Social Phobia or Social Anxiety Disorder (SAD) is a psychiatric disorder characterized by excessive fear or anxiety in social situations.

2. **Why the Correct Answer is Right:** In this case, the boy experiences intense fear and avoids attending school and going out in public places due to the fear of being ridiculed or harmed by his peers. This fits the diagnostic criteria for Social Anxiety Disorder (SAD), which is defined as the excessive fear or anxiety in social situations, causing significant distress and impairment in daily functioning.

3. **Why Each Wrong Option is Incorrect:**

A. **Option A (Obsessive-Compulsive Disorder):** This disorder is characterized by recurrent obsessions (intrusive thoughts) and compulsions (repetitive behaviors or mental acts). The symptoms described here do not align with the core features of OCD.

B. **Option B (Generalized Anxiety Disorder):** This disorder is characterized by excessive and uncontrollable worry about daily life events affecting multiple domains. The symptoms described here do not meet the diagnostic criteria for GAD, as the fear is specific to social situations in SAD.

C. **Option C (Panic Disorder):** This disorder is characterized by recurrent unexpected panic attacks with autonomic symptoms. The described symptoms do not align with the diagnostic criteria for Panic Disorder, as the fear is specific to social situations in SAD.

D. **Option D (Agoraphobia):** This disorder is characterized by an irrational fear of places or situations where escape might be difficult or help unavailable in the event of panic or dizzying symptoms. The described symptoms do not align with the diagnostic criteria for Agoraphobia, as the fear is specific to social situations in SAD.

4. **Clinical Pearl:** Social Anxiety Disorder (SAD) is a common mental health condition affecting approximately 16 million adults in the US annually. It is important for healthcare providers to be aware of this disorder to provide appropriate diagnosis and treatment.

5. **Correct Answer (Discussion):** Based on the described symptoms, the correct answer is **D (Social Anxiety Disorder)** because the fear and avoidance are specifically related to social situations, fulfilling the diagnostic criteria for Social Anxiety Disorder.