Task: Text Categorization
Input (English): Question: By what name is the disorder known to be characterized by the constant and persistent repetition of words, ideas, or themes, to which the patient continually appeals ?: 
 Options:  <0> Perseveration of thought. <1> Divagatory thinking. <2> Disintegration of thought. <3> Circumstantiality <4> Inhibition of thought.
Output (English): psychology