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: A patient with an internal arteriovenous fistula in the left arm will recommend: 
 Options:  <0> Put on a compressive bandage for protection. <1> Perform elbow flexion and extension exercises to activate their maturation. <2> Feel the fistula daily to check that it works. <3> Clean the surrounding skin with an antiseptic every day. <4> Lift weight with that hand to achieve vascular remodeling.
[EX A]: nursery

[EX Q]: Question: In strict vegetarians, a lack of one of the following vitamins may appear: 
 Options:  <0> B12 vitamin. <1> Vitamin C. <2> Retinol <3> Folate <4> Niacin
[EX A]: nursery

[EX Q]: Question: The traceability of an analytical method can be demonstrated: 
 Options:  <0> Carrying out the study of its selectivity. <1> By comparison with a reference method, use of certified reference materials and / or analysis of added samples. <2> Checking that the limit of detection of it is very low. <3> Evaluating the linearity of the calibration, whose most appropriate criterion is the correlation coefficient. <4> Making replicated measurements of the patterns and carrying out the analysis of the variance.
[EX A]:
chemistry