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
Alpha rhythm on EEG is seen in: 
Select and explain. 
A. Awake state, B. Mental work, C. Light sleep, D. Deep sleep
A: Awake state
Answer: A: Awake state 
Explanation: Alpha wave is seen when the person is awake, in a quiet, resting stage of cerebration. Mental work (focused attention) will convert alpha to beta wave. Light sleep converts alpha to theta wave.