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: The Pearson correlation coefficient: 
 Options:  <0> It is always greater than 1. <1> It is always less than 1. <2> It is between 0 and 1. <3> It is between -1 and 0. <4> It is between -1 and 1.
[EX A]: chemistry

[EX Q]: Question: Indicate which of the following is a mitochondrial disease: 
 Options:  <0> α-thalassemia <1> Essential fructosuria. <2> Leigh syndrome. <3> Cushing's syndrome. <4> Sickle cell anemia
[EX A]: pharmacology

[EX Q]: Question: Friedel-Crafts alkylation reactions lead to products that: 
 Options:  <0> They facilitate diazotization reactions. <1> They facilitate the reactions of formation of ethers. <2> Activate the aromatic ring against other substitutions. <3> They deactivate the aromatic ring against other substitutions. <4> None of the above.
[EX A]:
chemistry