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': 'A person with eyes closed and mind wandering will have the following wave in EEG \nSelect and explain. \nA. Beta waves, B. Alpha wave, C. Delta waves, D. Theta waves', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Alpha wave', 'role': 'assistant'}]