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: Physiology
Repetitive stimulation increases pain sensation, The probable cause is: 
Select and explain. 
A. Hyper-sensitization, B. Decreased reflex time, C. Increase in threshold of pain, D. Decreased receptor area
A: Hyper-sensitization
Answer: A: Hyper-sensitization 
Explanation: A i.e. Hyper - sensitization