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.
Problem:Question: It has been transcribed and it is also translated: 
 Options:  <0> mRNA. <1> rRNA. <2> Introns <3> tRNA. <4> Promoter.
Solution:
biology