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: A biosensor consists of: 
 Options:  <1> A receiver, a transducer, and an enzymatic brand. <2> A receptor and an enzymatic brand. <3> A transducer and an enzymatic brand. <4> A receiver and a transducer. <5> A receptor and an antibody.
