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: It is associated with gastric ulcers and cancers: 
 Options:  <1> Clostridium botulinum. <2> Yersinia enterocolitica. <3> Salmonella enterica <4> Helicobacter pylori. <5> Shigella sonnei.
