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: Anaesthesia
[{'content': 'Characteristic EEC pattern seen in surgical tolerance stage of anesthesia is? \nSelect and explain. \nA. Alpha, B. Beta, C. Delta, D. Theta', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Delta", 'role': 'assistant'}]