Which of these represents repolarization?
a. na+ influx
b. k+ influx
c. k+ efflux

The correct option is (c) K+ efflux

Explanation:

In neuroscience, after the depolarization phase of the action potential has changed the potential of the membrane to a positive value, the membrane potential returns back it to its negative value. This change or return of the membrane potential back to its negative value after the depolarization phase is known as Repolarization

Repolarization occurs when the positively charged K+ ions move out of the cell.

Therefore, the efflux of K⁺ ions represents repolarization.

none

explanation:

you did not provide anything to go off of.