Q: 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: The biological cycle of Trichinella spiralis is of the following type: 
 Options:  <0> Stenoxene <1> Optional. <2> Triheteroxene <3> Autoheteroxene <4> Heterogónico.
A:
pharmacology