Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: The excitatory postsynaptic potentials: 
 Options:  <1> They are all or nothing. <2> They are hyperpolarizing. <3> They can be added. <4> They spread long distances. <5> They present a refractory period.
