Task: Text Categorization
Input (English): Question: In gas chromatography, derivatization is very common, with several objectives. One of those discussed below is not among them: 
 Options:  <0> Increase the volatility of non-volatile compounds. <1> Avoid the decomposition of a compound, improving its stability. <2> Reduce the absorption on active surfaces of the walls of the column and the solid support. <3> Fragment the analyte in molecular ions of easier separation. <4> Improve the separation of closely related compounds with a very poor separation.
Output (English): chemistry