This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotic, Stress Related and Somatoform Disorders, Subject name: Psychiatry
Which of the following is not associated with panic disorder? 
Select and explain. 
A. Agoraphobia, B. Anticipatory anxiety, C. Panic attacks, D. Flash backs
D: Flash backs
Answer: D: Flash backs 
Explanation: Flashbacks are not characteristic of panic disorder they are characteristic of PTSD. Post-traumatic stress disorder is characterized by: Flashbacks Hyperarousal Nightmares Avoidance It typically happens within 6 months of exposure to a life-threatening event.