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': 'Propeies of alpha waves are all of the following except: September 2009 \nSelect and explain. \nA. It is most marked in the parieto-occipital area, B. It has a frequency of 8-12 Hz, C. Frequency is decreased by low glucose level, D. Seen in REM sleep', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: Seen in REM sleep', 'role': 'assistant'}]