Task: Text Categorization
Input (English): Question: The only autonomic adrenergic fibers are axons of neurons: 
 Options:  <0> Sympathetic preganglions. <1> Postganglionic sympathetics. <2> Preganglionic parasympathetic. <3> Postganglionic parasympathetic. <4> Parasympathetic ganglion.
Output (English): pharmacology