Task: Text Categorization
Input (English): Question: Which of the following answers is true about the HLA molecules? 
 Options:  <0> They are very polymorphic nuclear proteins. <1> They are divided into molecules of class IgG, IgA and IgM. <2> They join peptides and present them on the cell surface. <3> They interact with cytokines to modulate the immune response. <4> They are monomorphic.
Output (English): medicine