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'.

Example Input: Question: Which of these statements is NOT a characteristic of phase I clinical trials? 
 Options:  <1> They usually have non-therapeutic goals. <2> They can be done in healthy volunteers. <3> They can be done in patients. <4> They are usually randomized. <5> They are usually open.
Example Output: 4

Example Input: Question: In the preoperative period (2-6 years) the child usually thinks that the things of nature (rivers, mountains, etc.) have been built by the human being. This feature is called: 
 Options:  <1> Animism. <2> Realism. <3> Artificialism <4> Utilitarianism. <5> Pre-operative error
Example Output: 3

Example Input: Question: The determination of dissolved oxygen in natural water samples, using the Winkler method, is based on the previous oxidation of Mn (II) in an alkaline medium to: 
 Options:  <1> Mn (IV). <2> Mn (VI) <3> Mn (VII). <4> Mn (V). <5> Mn (I).
Example Output:
1