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'.

Input: Consider Input: Question: The excitotoxins activate: 
 Options:  <1> Nicotinic receptors <2> GABAA receptors <3> Glycine receptors. <4> NMDA receivers. <5> Na + channels dependent on voltage.

Output: 4


Input: Consider Input: Question: To proceed to the elaboration of suppositories by the method of discharge it is necessary to calculate the displacement factor that indicates: 
 Options:  <1> The weight, in grams, of drug that is displaced by one gram of excipient. <2> The volume of excipient that is displaced by 100 mL of drug. <3> The weight, in grams, of excipient that is displaced by 1mL of drug. <4> The weight, in grams, of drug that is displaced by 1 mL of excipient. <5> The weight, in grams, of excipient displaced by one gram of drug.

Output: 5


Input: Consider Input: Question: In the evaluation of a base with hydrochloric acid, it is known that the equivalence point appears at pH 5.54. If the bromocresol purple is used as indicator, whose turning interval is 5.2-6.8, the end point is observed at pH: 
 Options:  <1> 6.0, with a small error by default. <2> 6.8, with an error by excess. <3> 5.2, with a small error for excess. <4> 5.54. There is no error <5> 6.0, with an error for excess.


Output: 3