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: 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: Indinavir is a selective inhibitor of HIV protease because: 
 Options:  <1> By hydrolysis, the active drug is generated. <2> Rents irreversibly the active center of the enzyme. <3> Its structure mimics the transition state of the reaction catalyzed by the enzyme. <4> It is a suicide inhibitor. <5> Its symmetric structure interacts effectively with the active center of the enzyme.

SOLUTION: 3

PROBLEM: Question: Regarding the use of virtual reality on display, what is the correct answer? 
 Options:  <1> It totally replaces the real exposure. <2> Any real stimulus can be programmed with accuracy virtually. <3> Virtual reality allows the therapist to build a clinically meaningful environment. <4> Studies indicate better results than imaginative techniques. <5> Patients usually do not present difficulties in the virtual context.

SOLUTION:
3