This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Adult human who are awake with mind wandering and the eyes closed. Most likely EEG pattern is \nSelect and explain. \nA. Alpha-rhythm, B. Beta rhythm, C. Theta rhythm, D. Delta waves', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In adult humans who are awake but at rest with the mind wandering and eyes closed, the most prominent component of EEG is a fairly regular pattern of waves at a frequency of 8-13 Hz and amplitude of 50-100uV when recorded from the scalp this pattern is the alpha rhythm. Ref: Ganong&;s review of medical physiology;23rd edition; pg:233.', 'role': 'assistant'}]