Detailed Instructions: 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.
Q: Question: Very commonly the autoinducer molecules responsible for the quorum perception of many Gram-negative bacteria are:
Options: <0> N-acyl homoserine lactones. <1> Diaminopimelic acid. <2> Proteins <3> Hills <4> Fatty acids.
A:
biology