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: The organometallic compounds are derivatives: 
 Options:  <1> With a radical nature. <2> With covalent bonds between carbon atoms and metal atoms. <3> With electronic deficit and electrophilic character. <4> Practically not reactive. <5> With essentially reducing character.

Output: 2


Input: Consider Input: Question: Of the following pairs of surface molecules, what is used by the virgin T lymphocytes to extravasate to the lymph node? 
 Options:  <1> CCR7 and L-selectin. <2> VCAM and L-selectin. <3> CCR7 and ICAM-1. <4> CCR9 and L-selectin. <5> CCR4 and VCAM-1.

Output: 1


Input: Consider Input: Question: The degree of fluidity of the biological membranes depends on the percentage of: 
 Options:  <1> Lipids with hill. <2> Glycolipids. <3> Sphingolipids <4> Free fatty acids. <5> Unsaturated fatty acids.


Output: 5