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: Alcohol is included in the group of sedative or depressant drugs because it acts as: 
 Options:  <0> Cholinergic receptor agonist: nicotinic and muscarinic. <1> Antagonist of serotonergic (5 HT) and cholinergic receptors. <2> Noradrenergic receptor agonist and serotonin antagonist. <3> Antagonist of NMDA receptors and agonist of AMPA receptors. <4> GABA-a receptor agonist and NMDA receptor antagonist.
psychology