Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Question: A distension is defined as: 
 Options:  <0> Soft tissue injury. <1> Forced movement of abrupt production. <2> Injury by stretching a muscle. <3> Injury of the joint capsule. <4> Interruption in the continuity of a bone.
Solution: nursery
Reason: Distension means Bloating and swelling in the belly area. It does not have much to do with chemistry, psychology, pharmacology, biology and medicine. Hence, the correct topic is nursery.

Now, solve this instance: 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.
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
chemistry