This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sleep disorders and eating disorders, Subject name: Psychiatry
[{'content': 'Beta Wave tracing in EEG is found in \nSelect and explain. \nA. REM sleep, B. NREM sleep, C. Quiet wakefulness, D. Awake', 'role': 'user'}, {'content': 'Answer: D \nExplanation: EEG waves wave frequency condition beta > 13Hz during cognitive effos, drowsiness and light sleep alpha 8-13Hz relaxed wakefulness with eyes closed theta 4-7.5Hz deep sleep, hyperventillation delta 0.1-3.5Hz drowsiness, deep sleep Ref: Standard EEG in clinical psychiatry, Wiley-blackwell, 1e, pg 34.', 'role': 'assistant'}]