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: Inhibin: 
 Options:  <0> Inhibits the secretion of FSH. <1> Blocks the secretion of estrogen. <2> Stimulates the secretion of GnRH. <3> The adenohypophysis produces it. <4> Stimulates the secretion of LH.
biology