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
Slow waves in EEG activity seen in - 
Select and explain. 
A. Depression, B. Delirium, C. Schizophrenia, D. Mania
B: Delirium
Answer: B: Delirium 
Explanation: A diagnosis of delirium can be made if the patients EEG finding show a slowing of activity in brain.