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: Which of the following monoclonal antibodies presents as one of its main indications the treatment of chronic lymphoid leukemia? 
 Options:  <1> Trastuzumab. <2> Bevacizumab. <3> Denosumab. <4> Cetuximab <5> Rituximab
