Definition: 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: Question: For humans, the essential amino acids are: 
 Options:  <1> All proteins. <2> The non-protein. <3> The basic pH7. <4> Those that are not substrates of any transaminase. <5> Those who do not synthesize them.
