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: For the analysis of traces of inorganic constituents, in samples of organic nature, a preliminary treatment of the sample is needed, which normally consists of:
Options: <0> Dissolve the sample in cold water. <1> Dissolve the sample in hot water. <2> Dissolve the sample between 30 and 70 C. <3> Heat the sample between 400 and 700 C. <4> Heat the sample in 0.1 M hydrochloric acid.

SOLUTION: chemistry

PROBLEM: Question: The reaction of an alkene with metachloroperbenzoic acid causes a cyclic ether which is called:
Options: <0> Furano <1> Dioxane <2> Epoxide <3> Azirano <4> Lactone

SOLUTION: chemistry

PROBLEM: Question: The color of the eyes depends on the pigment present in:
Options: <0> Pupil. <1> Cornea. <2> Iris. <3> Choroid <4> Retina.

SOLUTION:
biology