You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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
Why? 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.

New input: Question: The validation of an analytical method includes:
Options: <0> Validate the analytical process as a whole, validate the range of concentrations in which it is applied and validate the method in each of the matrices to which it will be applied. <1> It only includes validating the range of concentrations in which it is applied. <2> It only includes validating the method in each of the matrices to which it will be applied. <3> It is only necessary to validate the treatment stages of the samples prior to the analytical measurement. <4> It is only necessary to validate the instrumentation by means of suitable calibrations.
Solution:
chemistry