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: Dental
[{'content': 'Audio analgesia is: \nSelect and explain. \nA. Source of distraction, B. Pain killer, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Audio analgesia: or" white noise” is a method of reducing pain. This technique consists of pro\xadviding a sound stimulus of such intensity that the patient finds it difficult to attend to anything\xa0else (Gardner, Licklider, 1959). Auditory stimulus such as pleasant music has been used to reduce\xa0stress and also reduce the reaction to pain.\nShobha Tandon 2nd Ed p:150', 'role': 'assistant'}]