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': 'Lallu a 22 yrs. old male suffers from decreased sleep, increased sexual activity, excitement and spending excessive money for last 8 days. The diagnosis is- \nSelect and explain. \nA. Confusion, B. Mania, C. Hyperactivity, D. Loss of memory', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Decreased sleep, increased sexual activity, excitement and spending excessive money are symptoms of mania.', 'role': 'assistant'}]