In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Q: Question: In gas chromatography, derivatization is very common, with several objectives. One of those discussed below is not among them: 
 Options:  <1> Increase the volatility of non-volatile compounds. <2> Avoid the decomposition of a compound, improving its stability. <3> Reduce the absorption on active surfaces of the walls of the column and the solid support. <4> Fragment the analyte in molecular ions of easier separation. <5> Improve the separation of closely related compounds with a very poor separation.

A: 4
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Q: Question: The main method for the preparation of βceto esters is the reaction known as: 
 Options:  <1> Malonic synthesis <2> Acetoacetic synthesis. <3> Condensing of Claisen. <4> Perkin reaction. <5> Hofmann reaction.

A: 3
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Q: Question: Dimethyl sulfoxide (DMSO): 
 Options:  <1> It is a protic polar solvent. <2> It is a polar aprotic solvent. <3> It is not a solvent. <4> It is a colorless solid. <5> None of the above.

A:
2
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