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: Physiology
[{'content': 'Alpha rhythm on EEG is seen in: \nSelect and explain. \nA. Awake state, B. Mental work, C. Light sleep, D. Deep sleep', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Alpha wave is seen when the person is awake, in a quiet, resting stage of cerebration. Mental work\xa0(focused attention) will convert alpha to beta wave. Light sleep converts alpha to theta wave.', 'role': 'assistant'}]