Answer:
The correct answer is option b.
Explanation:
The production of higher frequency of action potentials by the intense stimuli is known as frequency coding. It is a procedure by which the CNS, restricted by the all or none characteristics of conduction of nerve impulse, possesses the tendency to convey information about changing the intensity of signals. It performs this by imparting frequency modulation. The frequency of impulses changes with the strength of the stimulus.