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.

[EX Q]: Question: Agoraphobia is an anxiety disorder that consists of: 
 Options:  <0> An anxiety crisis or panic attacks that usually occur in an unexpected way. <1> An intense and persistent fear of performing public performances. <2> The presence of obsessions or compulsions of a recurring nature that cause great losses of time. <3> An acute mental disorder with a low socioeconomic and health burden. <4> The fear and avoidance of crowded places or situations from which it is difficult to escape.
[EX A]: nursery

[EX Q]: Question: In the synthesis of DNA, the quinolones act: 
 Options:  <0> Joining the double helix and thus blocking the progress of the replication fork. <1> Interlacing in the double helix and thus causing errors in the transcription. <2> On DNA gyrase. <3> As nucleotide analogs that are incorporated into DNA. <4> About DNA polymerases.
[EX A]: biology

[EX Q]: Question: The gradation of a tumor refers to: 
 Options:  <0> Determine the extent of the disease by considering tumor size and spread. <1> Measure the abnormal cell growth with respect to the size, shape and disposition of the tumor. <2> Obtain a sample of tissue to analyze it under a microscope and detect malignant cells. <3> Identify the type of tissue that caused the tumor and the degree to which the tumor cells retain the characteristics of the tissue of origin. <4> Select specific therapies to destroy tumor cells by interfering with their cellular functions.
[EX A]:
nursery