Task: Text Categorization
Input (English): Question: What is the PCNA or nuclear cell proliferation antigen? 
 Options:  <0> It is a protein that prevents the double helix from forming in the replication bubble. <1> It is a protein that increases the ability to replicate long fragments of eukaryotic DNA polymerase. <2> It is the protein responsible for the elimination of positive superhelices. <3> It is the typical conformation of the DNA double helix in eukaryotes. <4> It is the enzyme responsible for copying the DNA of the telomeres.
Output (English): pharmacology