Answer:
The correct answer will be option E- an action potential in the post synaptic neuron.
Explanation:
The excitatory postsynaptic potential or EPSP is the change in the membrane potential or voltage due to the opening of the sodium voltage-gated channels.
The opening of the Na⁺ voltage-gated channels leads to the influx of the Na⁺ ions inside the cells which causes the depolarization of the postsynaptic cells. This depolarization leads to the generation of the action potential in the cell which can be transmitted further.
Thus, option E is the correct option.