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
The increase in threshold of a receptor when a series of stimuli of subthreshold intensity are applied in succession is called: 
Select and explain. 
A. Adaptation, B. Accomodation, C. Initiation, D. Resistance
B: Accomodation
Answer: B: Accomodation 
Explanation: B i.e. Accomodation