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 following metals can be determined by complexometric or chelometric titration: 
 Options:  <1> All without exception. <2> All except transition metals. <3> All except lithium, sodium and potassium. <4> All except alkaline earth metals. <5> All except gold and silver.
