Teacher: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'.
Teacher: Now, understand the problem? Solve this instance: Question: Ultraviolet radiation changes the structure of DNA by:
Options: <1> Rupture of phosphodiester bonds. <2> Deamination of nitrogenous bases. <3> Depurinization <4> Formation of cyclobutyl rings of pyrimidines. <5> Hydroxylation of nitrogenous bases.
Student:
4