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.

[EX Q]: Question: Ribosomes have three binding sites for the transfer RNAs (RNAs), which are: 
 Options:  <0> Site A of acetyl, P of propyl and E of ethyl. <1> A site of aminoacyl, P of peptidyl and E of exit (from English, exit). <2> A site of aminoacyl, peptidyl P and transferase T of the peptide. <3> Site A of previous, P of posterior and E of entry (of English, entry). <4> A site of aminoacyl, peptidyl P and terminating T.
[EX A]: pharmacology

[EX Q]: Question: The ribosomal subunits are formed in the: 
 Options:  <0> Nucleoplasm. <1> Nucleolus <2> Nuclear sheet. <3> Nuclear pore. <4> Cytoplasm.
[EX A]: biology

[EX Q]: Question: Clay-colored stools are indicative of a problem of: 
 Options:  <0> Obstruction of the bile ducts. <1> Severe and prolonged diarrhea. <2> Gastrointestinal bleeding. <3> Long fasting. <4> Enteral feeding
[EX A]:
nursery