Task: Text Categorization
Input (English): Question: Ultraviolet radiation changes the structure of DNA by: 
 Options:  <0> Rupture of phosphodiester bonds. <1> Deamination of nitrogenous bases. <2> Depurinization <3> Formation of cyclobutyl rings of pyrimidines. <4> Hydroxylation of nitrogenous bases.
Output (English): chemistry