instruction:
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'.
question:
Question: Exposure to androgens in a sensitive or critical period, at the beginning of development, causes masculinization of the sexual and behavioral organs. This effect has received the name of: 
 Options:  <1> Motivational effect <2> Effect of pheromones. <3> Activating effect. <4> Organizer effect. <5> Biological effect
answer:
4


question:
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.
answer:
1


question:
Question: Atenolol is an antihypertensive β-antagonist that belongs to the structural family: 
 Options:  <1> Arylethanolamines <2> Quinazolines <3> β-Haloalkylamines. <4> Aryloxypropanolamines. <5> 2-Imidazolines.
answer:

4