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
Audio analgesia is: 
Select and explain. 
A. Source of distraction, B. Pain killer, C. Both, D. None
A: Source of distraction
Answer: A: Source of distraction 
Explanation: Audio analgesia: or" white noise” is a method of reducing pain. This technique consists of pro­viding a sound stimulus of such intensity that the patient finds it difficult to attend to anything else (Gardner, Licklider, 1959). Auditory stimulus such as pleasant music has been used to reduce stress and also reduce the reaction to pain.
Shobha Tandon 2nd Ed p:150