instruction:
In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
question:
Question: It is associated with gastric ulcers and cancers: 
 Options:  <0> Clostridium botulinum. <1> Yersinia enterocolitica. <2> Salmonella enterica <3> Helicobacter pylori. <4> Shigella sonnei.
answer:
biology


question:
Question: Echinocandins are antifungal compounds that act by inhibiting: 
 Options:  <0> The synthesis of ergosterol. <1> The synthesis of the cell wall. <2> The synthesis of DNA. <3> The synthesis of proteins. <4> The formation of microtubules.
answer:
pharmacology


question:
Question: Which of the enzymes contains manganese? 
 Options:  <0> Glutathione S-transferase. <1> Glutathione reductase. <2> Peroxidated glutathione. <3> Superoxide dismutase. <4> Catalase
answer:

chemistry