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
At what stage the alpha rhythm seen in an EEG? 
Select and explain. 
A. Awake Agitated, eyes open and mind wandering, B. Awake, at rest, mind wandering and eyes closed, C. Aroused with attention focused on something, D. REM sleep
B: Awake, at rest, mind wandering and eyes closed
Answer: B: Awake, at rest, mind wandering and eyes closed 
Explanation: Alpha waves