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 general, water intake should be increased in patients undergoing chemotherapy with the aim of: 
 Options:  <1> Prevent kidney damage. <2> Fluidify bronchial secretions. <3> Relieve post-chemotherapy nausea. <4> Increase the volume. <5> Decrease the risk of infection.

Output: 1


Input: Consider Input: Question: The deoxyribonucleotides are synthesized: 
 Options:  <1> From the ribonucleotide triphosphate. <2> From the ribonucleotides diphosphate. <3> From NADPH. <4> By oxidation of ribonucleotides. <5> For DNA polymerase III.

Output: 2


Input: Consider Input: Question: The main function of chemokines is: 
 Options:  <1> Regulate lymphocyte traffic. <2> Stimulate cell proliferation in response to chemical agents. <3> Amplify the production of antiviral cytokines. <4> Regulate the selection in the thymus. <5> Antagonize some cytokines.


Output: 1