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
Which one of the following is the description used for the term allodynia during pain management ? 
Select and explain. 
A. Absence of pain perception, B. Complete lack of pain sensation, C. Unpleasant sensation with or without a stimulus, D. Perception of an ordinarily non-noxious stimulus as severe pain
D: Perception of an ordinarily non-noxious stimulus as severe pain
Answer: D: Perception of an ordinarily non-noxious stimulus as severe pain 
Explanation: Allodynia refers to perception of an ordinarily non-noxious stimulus as pain.