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: The Toll-like receptors (TLRs) mainly recognize: 
 Options:  <1> Proteins <2> Superantigens. <3> Non-polymorphic histocompatibility antigens. <4> Various components of microbes. <5> Tolerógenos.
