Task: Text Categorization
Input (English): Question: A complication of transplantation of hematopoietic precursors is: 
 Options:  <0> Common variable immunodeficiency. <1> Graft-versus-host disease. <2> Immunodeficiencies in complement components. <3> The lack of NK lymphocytes. <4> Chronic granulomatous disease.
Output (English): biology