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: It has been proven that amphetamines have reinforcing effects because: 
 Options:  <1> They are GABAergic agonists. <2> They are dopaminergic antagonists. <3> They are serotonergic antagonists. <4> They are dopaminergic agonists. <5> They are serotonergic agonists.

Output: 4


Input: Consider Input: Question: Which of the following moments of the electrocardiogram corresponds to the depolarization stage of the ventricular myocardium ?: 
 Options:  <1> Onda P. <2> Onda T. <3> Segment T-P. <4> Segment P-Q. <5> QRS wave.

Output: 5


Input: Consider Input: Question: The atrial syncytium is separated from the ventricular by: 
 Options:  <1> The atrio-ventricular valves. <2> The semilunar valves. <3> The fibrous skeleton. <4> The interventricular septum. <5> The Beam of His.


Output: 3