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: Consider Input: Question: In relation to the physiology of the complement system, one of the following statements is false: 
 Options:  <1> Most of its components are inactive. <2> Its mode of activation is similar to the coagulation cascade. <3> It is subject to strict control of regulatory mechanisms. <4> It is only activated by two different routes: the classical and the alternative. <5> During its activation, multimolecular complexes are formed.

Output: 4


Input: Consider Input: Question: The CD40 ligand molecule (CD40L or CD154) is expressed in: 
 Options:  <1> Virgin T lymphocytes. <2> Activated T lymphocytes <3> NK lymphocytes. <4> Virgin B lymphocytes. <5> B activated lymphocytes.

Output: 2


Input: Consider 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


Output: 5