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: Pathology
Reaction to stimulus which is normally not painful is: 
Select and explain. 
A. Allodynia., B. Hypoalgesia., C. Hypoaesthesia., D. None.
A: Allodynia.
Answer: A: Allodynia. 
Explanation: None