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': 'Mania is a - \nSelect and explain. \nA. Mood disorder, B. Psychological disorders, C. Obsessive disorder, D. Neurotic disorder', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]