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: The proofreading activity of the DNA Polymerase is an activity: 
 Options:  <1> 5'-3'Exonuclease. <2> 3'-5'Exonuclease. <3> Polymerizing 5'-3 '. <4> Endonuclease. <5> Transesterifier.
