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'.

[Q]: Question: The tube of very small diameter and about 6 meters in length that runs along the posterolateral side of the testicle and connects with the vas deferens, is it called? 
 Options:  <1> Prostate. <2> Epididymis <3> Urethra. <4> Epéndimo. <5> Seminiferous tubule.
[A]: 2


[Q]: Question: What kind of validity does the degree of confidence refer to, with which it can be inferred that the cause-effect relationships between the variables of an investigation are interpretable in the sense suggested by the researcher? 
 Options:  <1> Internal validity <2> External validity <3> Discriminant validity <4> Ecological validity <5> Construct validity
[A]: 1


[Q]: Question: Polarography is an analytical technique that refers to: 
 Options:  <1> The absorption of electromagnetic radiation. <2> The emission of electromagnetic radiation. <3> The voltametry with mercury electrode. <4> The use of palladium as a reference electrode. <5> To the potential of asymmetry.
[A]:
3