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': 'Slow waves in EEG activity seen in - \nSelect and explain. \nA. Depression, B. Delirium, C. Schizophrenia, D. Mania', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A diagnosis of delirium can be made if the patients EEG finding show a slowing of activity in brain.', 'role': 'assistant'}]