**Question:** Which of the following is NOT a clinical feature of Post-Traumatic Stress Disorder (PTSD)?

A. Flashbacks
B. Insomnia
C. Depression
D. Social withdrawal

**Core Concept:** Post-Traumatic Stress Disorder (PTSD) is a psychiatric disorder that can develop in individuals who have experienced or witnessed a traumatic event, such as combat, assault, or natural disasters. PTSD symptoms are classified into four categories: Re-experiencing, Avoidance, Numbing, and Hyperarousal.

**Why the Correct Answer is Right:** Option D, Social withdrawal, is not considered a specific clinical feature of PTSD. While social avoidance could be a coping mechanism for some individuals with PTSD, it is not a core symptom category. Re-experiencing, Avoidance, and Hyperarousal are the main features of PTSD.

**Why Each Wrong Option is Incorrect:**

A. Flashbacks: This is a common feature of PTSD, wherein the individual experiences vivid, intrusive memories or images of the traumatic event, often accompanied by intense emotional responses.

B. Insomnia: Insomnia can be a symptom of PTSD, as the body's heightened stress response may interfere with sleep patterns.

C. Depression: Depression is a common comorbidity with PTSD, as the stress and emotional trauma of the traumatic event may lead to mood disturbances.

**Clinical Pearl:** While it is essential to recognize the core clinical features of PTSD, it is equally crucial to be aware of comorbid conditions that may coexist alongside PTSD, such as depression and insomnia. A thorough understanding of these comorbidities allows for accurate diagnosis and appropriate treatment planning.

**Correct Answer:** .