Instructions: 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 procedure to identify health problems is through the agreement of people who have qualified information about the community. Two of the most frequently used techniques are: 
 Options:  <1> The questionnaire and the programs. <2> The techniques by indicators and by criteria. <3> The Delphi technique and the Nominal Group technique. <4> The questionnaire and the community forum. <5> All the previous answers are correct.
Output:
3