Task: Text Categorization
Input (English): Question: The proofreading activity of the DNA Polymerase is an activity: 
 Options:  <0> 5'-3'Exonuclease. <1> 3'-5'Exonuclease. <2> Polymerizing 5'-3 '. <3> Endonuclease. <4> Transesterifier.
Output (English): chemistry