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: 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.

Output: 4


Input: Consider Input: Question: Naloxone is used in the treatment of poisoning with: 
 Options:  <1> Opiates <2> Benzodiazepines. <3> Barbiturates <4> Tricyclic antidepressants. <5> Digitálicos.

Output: 1


Input: Consider Input: Question: Graphite: 
 Options:  <1> It gives intercalation compounds with fluorine. <2> Reacts with sodium to give a covalent compound with C ̶ Na bond. <3> Reacts with sodium to give intercalation compounds that have the same distance between layers that pure graphite had. <4> Reacts with sodium to give intercalation compounds that are better electrical conductors than pure graphite. <5> It gives covalent compounds with bromine with C ̶ Br bond.


Output: 4