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 organometallic react with the nitriles giving: 
 Options:  <0> Amino acids. <1> Lactones. <2> Alcohols <3> Ketones <4> None of the above.
[EX A]: chemistry

[EX Q]: Question: The nuclear lamina is formed by: 
 Options:  <0> Actina. <1> Tubulina. <2> Intermediate filaments <3> Fibronectin <4> Laminin
[EX A]: biology

[EX Q]: Question: Graphite is a conductor because: 
 Options:  <0> The valence band has electronic vacancies. <1> The driving band has electronic vacancies. <2> Both bands have electronic vacancies. <3> The banned band is very big. <4> The band gap is zero.
[EX A]:
chemistry