This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Which is the EEG wave recorded in a subject who is awake but eyes closed? \nSelect and explain. \nA. Alpha waves, B. Beta waves, C. Theta waves, D. Delta waves', 'role': 'user'}, {'content': "Answer: A \nExplanation: Alpha waves are recorded best in the parieto-occipital region in adults at rest, i.e., awake but relaxed with eyes closed. EEG Waves Frequency (in HZ) Amplitude (in mV) Location where it is best-recorded Alpha Rhythm 8-13 50-100 Parieto-occipital regions Beta Rhythm 13-30 5-10 Frontal region Theta Waves 4-8 <200 Parietal and temporal regions in children Delta Waves 0.5-4 20-200 (large amplitude) Occipito-temporal Ref: Ganong's Review of Medical Physiology 25th edition Pgno: 272-273", 'role': 'assistant'}]