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 patient with dyspepsia will undergo a screening test for Helicobacter pylori. Before carrying out the test, the patient should know that:
Options: <1> Treatment with proton pump inhibitors should be discontinued at least one week before the test. <2> Treatment with proton pump inhibitors should be discontinued at least two weeks before the test. <3> The use of antacids also modifies the results of the test. <4> The use of antibiotics does not modify the diagnostic tests for H. pylori. <5> Antibiotic treatments negativize the diagnostic tests for H. pylori, so these drugs should be avoided for one week before any diagnostic test.
Output:
2