Definition: 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'.
Input: Question: In eukaryotes, the DNA polymerase β: 
 Options:  <1> It is a polymerase of family B. <2> It carries out the synthesis and repair of mitochondrial DNA. <3> Replicate DNA with injuries. <4> It is involved in the repair of nuclear DNA. <5> The synthesis of nuclear DNA begins.
