Task: Text Categorization
Input (English): Question: Th1 lymphocytes: 
 Options:  <0> Activate B lymphocytes and eosinophils. <1> Activate macrophages and NK lymphocytes. <2> They secrete mainly IL-4. <3> They promote the production of IgE. <4> They are a type of Treg lymphocytes.
Output (English): biology