The disorder that Raunak is experiencing, characterized by excessive fear of certain objects (like reptiles) and physical symptoms such as sweating, fainting, and heart pounding, is most closely related to Panic disorder. Panic disorder involves sudden, intense periods of fear or discomfort (panic attacks) where individuals experience symptoms such as heart palpitations, shortness of breath, and fear of imminent danger.
- Somatic symptom disorder involves excessive focus on physical symptoms like pain or fatigue, which does not match Raunak's case.
- Obsessive-Compulsive disorder involves repetitive behaviors or thoughts (obsessions and compulsions), which is not relevant to Raunak’s fear of reptiles.
- Depressive disorder involves persistent feelings of sadness or loss of interest, which does not describe Raunak’s situation.
Thus, the correct answer is Panic disorder.