TASK 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'.
PROBLEM: Question: In mammals, Toll-like receptors (TLRs) are receptors: 
 Options:  <1> Signaling. <2> Antigenic <3> Of histocompatibility alleles. <4> Of phagocytosis. <5> Of chemokines.

SOLUTION: 1

PROBLEM: 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.

SOLUTION: 2

PROBLEM: Question: What psychosocial theory considers as maladjusted to the elderly who try to maintain previous levels and patterns of activity: 
 Options:  <1> Activity. <2> Empty of roles. <3> Continuity. <4> De-linking <5> Structured dependence.

SOLUTION:
4