This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood disorders, Subject name: Psychiatry
DSM-IV criterion for depression is 
Select and explain. 
A. 1 week, B. 2 week, C. 3 week, D. 4 week
B: 2 week
Answer: B: 2 week 
Explanation: The duration of symptoms of depression according to DSM-5 diagnostic criteria for major depression is 2 weeks. DSM IV is older version of DSM., present version is 5th.