TASK DEFINITION: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
PROBLEM: Question: The minimum amount of auditory stimulation needed to begin to identify the lyrics of a song is a threshold: 
 Options:  <0> Absolute. <1> Subliminal. <2> Differential. <3> Relative. <4> Musical.

SOLUTION: psychology

PROBLEM: Question: The effect of anti-D gammaglobulin given to Rh negative women who have developed an Rh positive fetus is: 
 Options:  <0> Eliminate fetal red blood cells from maternal blood. <1> Destroy the antigens formed by the mother's immune system. <2> Avoid the formation of anti-Rh negative antibodies. <3> Induce the formation of maternal antibodies against fetal antigen. <4> Provide the woman with permanent active immunity.

SOLUTION: nursery

PROBLEM: Question: The urea cycle: 
 Options:  <0> It involves the degradation of urea. <1> It was proposed by Hatch and Slack. <2> It contains a reaction that transforms citrulline into ornithine. <3> It is intimately linked to glycolysis. <4> It begins with the formation of carbamylphosphate.

SOLUTION:
chemistry