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': 'An EEG - \nSelect and explain. \nA. Provides indication of intelligence, B. Tends to show waves of smaller amplitude during deep sleep than of ale state, C. Tends to show waves of smaller amplitude during deep sleep than of ale state, D. Is bilaterally symmetrical', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Is bilaterally symmetrical', 'role': 'assistant'}]