## **Core Concept**
The question tests the understanding of anxiety disorders, specifically focusing on the diagnosis of **agoraphobia**. Agoraphobia is characterized by an anxiety disorder where individuals fear being in public places, crowds, or situations where escape might be difficult or embarrassing, or where help may not be available.

## **Why the Correct Answer is Right**
The correct answer, **Agoraphobia**, fits the description provided in the scenario. The patient's fears of leaving home, traveling alone, and being in a crowd, along with the physical symptoms of anxiety such as palpitations and sweating in these situations, are hallmark symptoms of agoraphobia. The avoidance behavior, in this case, avoiding public transport to go to work, is also a key feature of this disorder. Agoraphobia often develops after a person has experienced one or more panic attacks, leading to a fear of having a panic attack in a situation from which escape might be difficult.

## **Why Each Wrong Option is Incorrect**
- **Option A (Social Anxiety Disorder):** This is incorrect because, although social anxiety disorder involves fear and avoidance of social situations, the primary fear is of being judged or evaluated by others, not the fear of having panic-like symptoms or being in situations where escape might be difficult.
- **Option B (Specific Phobia):** This is incorrect because specific phobias involve a persistent and excessive fear of a specific object, situation, or activity. While the fears described could seem specific, agoraphobia encompasses a broader range of situations and is tied to fears of panic and being trapped.
- **Option D (Panic Disorder):** This is incorrect because, although panic disorder involves recurrent panic attacks, it does not specifically involve the fear of being in certain situations due to concerns about panic or incapacitation.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that **agoraphobia** often presents with a **comorbid diagnosis of panic disorder**. The presence of panic attacks can significantly impact the development and severity of agoraphobic symptoms. A useful mnemonic to differentiate anxiety disorders is to consider the **"3 Fs" of anxiety:** *Fear*, *Fear of fear*, and *Fear of being in situations where escape is difficult* (more commonly associated with agoraphobia).

## **Correct Answer:** C. Agoraphobia