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: DO NOT generate action potentials: 
 Options:  <1> Smooth muscle fibers. <2> Bipolar neurons of the retina. <3> Skeletal striated muscle fibers. <4> Cardiac muscle fibers. <5> Ganglion neurons of the retina.
