Task: Text Categorization
Input (English): Question: When performing the Ames test, what result would reveal that the compound is a mutagen? 
 Options:  <0> Abnormal division in mouse uterus cells. <1> Abnormal growth in mouse. <2> Proliferation of a hamster ovary cell culture. <3> Reversal in the growth characteristics of Salmonella. <4> No option is correct.
Output (English): pharmacology