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: What type of amino acid side chains will compete with saline ions for solvation water ?: 
 Options:  <0> Apolares. <1> Aliphatic <2> Aromatic <3> Polar <4> Without charge.
chemistry

Question: In strict vegetarians, a lack of one of the following vitamins may appear: 
 Options:  <0> B12 vitamin. <1> Vitamin C. <2> Retinol <3> Folate <4> Niacin
nursery

Question: Benzodiazepines reduce anxiety because they work as: 
 Options:  <0> Antagonists of GABA receptors. <1> GABA receptor agonists. <2> Antagonist of noradrenergic receptors. <3> Noradrenergic receptor agonist. <4> Antagonists of serotonergic receptors.

psychology