**Question:** Free-floating persistent anxiety and Excessive worry are characteristic features of

A. Generalized Anxiety Disorder (GAD)
B. Major Depressive Disorder
C. Post-traumatic Stress Disorder (PTSD)
D. Schizophrenia

**Core Concept:**
Anxiety is a normal response to stress, helping individuals to adapt and cope with challenging situations. However, when anxiety becomes excessive, persistent, and disproportionate to the actual threat, it can indicate an underlying psychiatric disorder. The three categories of anxiety disorders are Generalized Anxiety Disorder (GAD), Major Depressive Disorder, Post-traumatic Stress Disorder (PTSD), and Schizophrenia.

**Why the Correct Answer is Right:**
Free-floating persistent anxiety refers to the anxiety that is not directly related to a specific situation or trigger. Excessive worry is the excessive preoccupation with events or activities that are unlikely to occur or have a low probability of causing harm. Both these symptoms are prominent in Generalized Anxiety Disorder (GAD).

**Why Each Wrong Option is Incorrect:**
1. **Major Depressive Disorder (B):** While individuals with Major Depressive Disorder might experience anxiety, excessive worry, and free-floating persistent anxiety are not prominent features in this disorder.
2. **Post-traumatic Stress Disorder (C):** PTSD is characterized by anxiety related to a specific traumatic event, not free-floating persistent anxiety. Excessive worry is related to the traumatic event rather than unrelated activities.
3. **Schizophrenia (D):** Schizophrenia is a psychotic disorder characterized by delusions, hallucinations, disorganized thinking, and negative symptoms, not free-floating persistent anxiety and excessive worry.

**Clinical Pearl:**
Understanding the specific characteristics of anxiety disorders is essential for accurate diagnosis and appropriate treatment. It is crucial for medical students and practicing physicians to distinguish between different anxiety disorders, as treatment strategies vary for each. For example, GAD is treated with selective serotonin reuptake inhibitors (SSRIs) or benzodiazepines, while PTSD is treated with cognitive-behavioral therapy (CBT) and selective serotonin reuptake inhibitors (SSRIs).