None of the offered answers isn’t correct.
After a neuron has reached action potential, the recovery period takes place in which no further action potentials can fire. The surge of depolarization which travels through the axon of the neuron is known as an action potential. The action potential travels to the axon terminal, where it triggers the release of neurotransmitters. Before the next action potential, the resting membrane potential of the axon must be restored and this is known as the recovery period of the neuron (the neuron cannot transmit another action potential).
