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 electrolytic cells: 
 Options:  <1> They always have three electrodes. <2> They always have two compartments separated by a salt bridge. <3> They can have a single compartment. <4> They always have a reference electrode. <5> They always use platinum electrodes.
