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
Intensity of sensory stimulation is directly related to- 
Select and explain. 
A. Duration of action potential (AP), B. Frequency of action potential, C. Amplitude of action potential, D. All of the above
B: Frequency of action potential
Answer: B: Frequency of action potential 
Explanation: Number of receptor stimulated and frequency of action potential generated can control the intensity of a stimulus.