Task: Text Categorization
Input (English): Question: The cholera toxin: 
 Options:  <0> Inhibits protein synthesis. <1> It is hemolytic and dermonecrotic. <2> Alters the flow of electrolytes in the intestine. <3> It is formed by a single polypeptide that is cleaved by the effect of proteases. <4> It produces food poisoning.
Output (English): biology