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 reaction of 3-nitrobenzaldehyde with NaBH 4 in aqueous methanol gives: 
 Options:  <0> 3-Aminobenzaldehyde. <1> 3-nitrobenzoic acid. <2> 1-Methyl-3-nitrobenzene. <3> 3-Nitrobenzoate sodium. <4> (3-Nitrophenyl) methanol.
[EX A]: chemistry

[EX Q]: Question: When an experimental design is carried out, it is fundamentally sought: 
 Options:  <0> Know better the average of the results obtained and repeated in an experiment. <1> Know better the median of the results obtained in an experiment. <2> Identify better the factors that can affect the experiment. <3> To better identify the regression equations in an experiment. <4> To know better the standard deviation of the different data in the experiment.
[EX A]: chemistry

[EX Q]: Question: Homosexual male of 30 years of age HIV (+) who participates as a volunteer in a help center for patients with AIDS. According to her clinical history she received diphtheria toxoid (Td) 6 years ago, the MMR vaccine in childhood and adolescence, and hepatitis B three years ago. He is currently asymptomatic with a CD4 count greater than 200 cls / μl. What vaccines should we recommend? 
 Options:  <0> Seasonal influenza, pneumococcal, tetravalent meningitis and hepatitis A. <1> Seasonal flu, Td, pneumococcal and tetravalent meningitis. <2> Templavalent meningitis, pneumococcal and seasonal influenza. <3> Td, tetravalent, pneumococcal meningitis. <4> Viral triple, seasonal flu, pneumococcal.
[EX A]:
medicine