<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 27-year-old man is brought to the emergency department with minor injuries sustained in a motor vehicle accident. He says that he is fine. He also witnessed the death of a teenage girl in the accident who was his sisters friend. He is able to return to work within a few days. A month later, he presents being withdrawn and increasingly irritable. He says recently he has been experiencing depressed moods and higher anxiety than usual. He says that he feels guilty about the girls death, stating that he could have saved her if only he had acted quicker. He adds that he became extremely anxious while driving by a car accident on the freeway recently, and that, even when watching television or a movie, he feels panicked during a car crash scene. Which of the following is the most likely diagnosis in this patient?? A: Adjustment disorder, B: Acute stress disorder, C: Generalized anxiety disorder, D: Panic disorder, E: Post-traumatic stress disorder,  <response>: This is a clinical vignette describing a 27-year-old man who was involved in a motor vehicle accident where a teenage girl died. In the weeks following the accident, he has developed symptoms of depressed mood, increased anxiety, guilt about the girls death, and panic symptoms when exposed to reminders of the trauma. The key features are the development of psychiatric symptoms following a traumatic event. The symptoms described, including intrusive re-experiencing, avoidance, negative mood, and increased arousal are consistent with post-traumatic stress disorder PTSD. Adjustment disorder may cause distress following a stressor but does not include the full spectrum of PTSD symptoms. Acute stress disorder occurs within 4 weeks of the trauma so does not fit the 1 month timeframe. Generalized anxiety disorder and panic disorder may explain some symptoms but do not account for the full clinical picture in the context of the preceding trauma.E: Post-traumatic stress disorder 