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
Duration needed to diagnose hypomania is 
Select and explain. 
A. 1 day, B. 4 day, C. 1 week, D. 2 weeks
B: 4 day
Answer: B: 4 day 
Explanation: Symptoms of elevated mood should be present for 4 days to diagnose as hypomania.