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: In the translation of prokaryotes, the first tRNA: 
 Options:  <0> It is introduced in site A. <1> Join a methylated amino acid. <2> It is accompanied by the IF2 factor. <3> It is paired with a UGA start codon. <4> Always join serina.

SOLUTION: biology

PROBLEM: Question: A study is carried out to investigate the association between factor X and disease Z. To do this, 120 subjects with the disease and 420 controls (without the disease) are matched by age and sex. In both groups it is found that 20 subjects were exposed to factor X. What is the odds ratio (OR) between factor X and disease Z? 
 Options:  <0> OR = 1 (no association). <1> OR = 2. <2> OR = 4 <3> OR = 6 <4> OR = 8

SOLUTION: medicine

PROBLEM: Question: What is estimated with the measurement of skin folds? 
 Options:  <0> The total body mass. <1> The lean mass. <2> The body fat. <3> The relationship between fat mass and muscle mass. <4> The skeletal muscles.

SOLUTION:
nursery