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 only autonomic adrenergic fibers are axons of neurons: 
 Options:  <1> Sympathetic preganglions. <2> Postganglionic sympathetics. <3> Preganglionic parasympathetic. <4> Postganglionic parasympathetic. <5> Parasympathetic ganglion.
