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
Post Traumatic stress syndrome is due to 
Select and explain. 
A. Head Injury, B. CVD, C. Minor Stress, D. Major Life threatening events
D: Major Life threatening events
Answer: D: Major Life threatening events 
Explanation: D i.e. Major life threatening events