Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: A complication of transplantation of hematopoietic precursors is: 
 Options:  <1> Common variable immunodeficiency. <2> Graft-versus-host disease. <3> Immunodeficiencies in complement components. <4> The lack of NK lymphocytes. <5> Chronic granulomatous disease.
