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 determination of cyanide by the Liebig method is based on the addition of a silver nitrate standard solution: 
 Options:  <1> Until complete precipitation of silver cyanide. <2> Until the precipitation of silver cyanide begins. <3> Until the appearance of a red precipitate of silver chromate. <4> Until the AgCN complex is quantitatively formed. <5> Until the precipitation of silver iodide, yellow.

Ex Output:
2


Ex Input:
Question: To multiply, the rhabdoviruses enter the host cell by: 
 Options:  <1> Viropexy <2> Endocytosis <3> Depopolimerization of the virion as a consequence of the interaction with the cellular receptor. <4> Direct translocation <5> Opsonic phagocytosis.

Ex Output:
2


Ex Input:
Question: What theoretical orientation prevailed in the first phase of Psychosomatic Medicine ?: 
 Options:  <1> Behaviorism <2> Psychoanalysis. <3> Existentialism. <4> Cognitivism <5> Systemic Psychology

Ex Output:

2