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: In an electrogravimetric analysis: 
 Options:  <1> The increase in mass of the electrode indicates the amount of analyte. <2> Current performance must be 100%. <3> A platinum mesh is always used as a working electrode. <4> A reference electrode is always needed. <5> The solution does not need to be conductive.
