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
[{'content': 'Elevated mood for ______ is essential to diagnose as mania. \nSelect and explain. \nA. 1 week, B. 2 week, C. 3 week, D. 4 week', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Elevated mood for 1 week is the essential criteria to diagnose mania.', 'role': 'assistant'}]