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.

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.
Science

One protagonist in this novel spends a summer with the wife of Colonel Forster, and that character's aunt and uncle have the surname Gardiner. One character in this novel initially rejects a marriage proposal by Mr. Collins, while her sister is romanced by Mr. Bingley, and another romance in this novel is initiated by the master of Pemberley, Mr. Darcy. For 10 points, name this novel about the sisters of the Bennet family, one of whom is Elizabeth, by Jane Austen.
Literature

This man was supposedly fought against by a woman who killed using only roasted spits and stones; that woman was Zarcamodonia. Alessandro de Mecici oversaw the negotiations between this man and another that resulted in the Peace of Vervins. This king's troops, led by Fadrique Alvarez de Toledo, stormed Mechelen. This man's forces retook the Alpujarras region after the Battle of Galera. This man's attempts to force people to abandon their style of clothing led to the second revolt of the Moriscos. While serving this king, the Spanish Fury was carried out on the orders of the Duke of Alba. Two years after winning at San Quentin, this king signed the Peace of Cateau-Cambresis with Henry II of France. For 10 points, name this Spanish king who was married to Mary I.

History