In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

[EX Q]: It is not serotonin, but the selective reuptake of this compound is inhibited by tiagabine, and it is converted to succinic acid semi-aldehyde, which is subsequently oxidized to succinic acid in the shunt which produces this compound. One receptor for it forms a heteropentameric complex and in immature neurons, this compound facilitates the outward flux of chloride ions, which is why benzodiazepines are ineffective anticonvulsants in newborns. One receptor for it includes a benzodiazepine binding site, and isoguvacine THIP, and muscimol serve as competitive agonists to this molecule. Synthesized by the decarboxylation of glutamic acid, this neurotransmitter is best known for its role as the chief inhibitory neurotransmitter. For 10 points, identify this neurotransmitter, which is often referred to by its four letter acronym.
[EX A]: Science

[EX Q]: The allegretto vivace scherzo of one of this man's symphonies opens with a fugato in which first violins, then second violins, violas, and celli in turn enter with the leggiero theme. He used a nearly opposite order of entry in the fugato development of the adagio second movement of another symphony. This composer's aria "De mon amie" was based on that movement, and the symphony borrows heavily from Charles Gounod's Symphony in D. French horns imitate church bells in the "Carillon" movement of one suite by this composer of the Roma Symphony. The prelude to that suite and farandole from a later suite both quote the "March of the Kings," and both came from incidental music for an Alphonse Daudet play. For 10 points, name this French composer who wrote a Symphony in C at seventeen, as well as L'Arlesienne and the operas The Pearl Fishers and Carmen.
[EX A]: Fine Arts

[EX Q]: This molecule exerts its effects by binding to its eponymous transmembrane protein receptor, which inactivates CTR1 to initiate a signal cascade, resulting in EIN3 turning on relevant gene expression. Silver salts inhibit its actions by binding its receptor, and it is responsible for the formation of the apical hook of many eudicot seedlings. Sometimes called the "senescence hormone," it promotes stem swelling but inhibits stem elongation, but is best known for its promotion of leaf abscission and fruit ripening. FTP, name this plant hormone, a simple gaseous molecule with formula C2H4.
[EX A]:
Science