This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
A victim of Tsunami has difficulty in overcoming the experience. She still recollects the happening in dreams and thoughts. The most likely diagnosis is : 
Select and explain. 
A. Post traumatic stress disorder, B. Conversion disorder, C. Panic disorder, D. Phobia
A: Post traumatic stress disorder
Answer: A: Post traumatic stress disorder 
Explanation: Recollection of the happening in dreams & thought after a life threatening event suggests the diagnosis of PTSD.