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'.

Ex Input:
Question: The Aminoacyl-tRNAs:
Options: <1> They are the precursors of the RANs. <2> They are enzymes that catalyze the synthesis of amino acids. <3> They are part of the ribosomes. <4> They are the tRNAs loaded with the amino acid specified by its anticodon sequence. <5> They are synthesized by RNA Polymerase II.

Ex Output:
4

Ex Input:
Question: The electron transport molecules:
Options: <1> They are coenzymes of a nucleotide nature. <2> They exchange electrons in oxidation-reduction reactions. <3> They are molecules capable of oxidation and reduction. <4> FAD (flavin adenine dinucleotide) and FMN (flavin mononucleotides) are electron transport molecules. <5> All are true.

Ex Output:
5

Ex Input:
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.

Ex Output:
3