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]: Fred Hampton and Mark Clark were two Black Panthers shot to death in this city while they were asleep. Anthony Abbate (read: A BODY) violently beat the bartender Karolina Obrycka in this city after she refused to continue serving him. Jon Burge was convicted of perjury in this city in 2010, which he committed in the course of civil suits against him for the torture he ordered as Commander of the Area 2 violent crimes unit in the 1980s. In 1886, seven anarchists were sentenced to death in this city following an incident when a pipe bomb explosion caused a line of policemen to fire into a crowd of striking workers in Haymarket Square in this city. For ten points, what is this city notorious for police violence, particularly the violence ordered by Mayor Richard J. Daley during the 1968 Democratic National Convention
[EX A]: History

[EX Q]: This quantity is multiplied by the Verdet constant to calculate specific rotation, and this quantity perpendicular to the direction of propagation makes the medium birefringent in the Voigt effect. Small values of this quantity are measured by SQUIDs, and below the critical temperature, it is zero inside superconductors. Ampere's Law relates the tangential component of it integrated around a closed curve, and according to Gauss's Law, the net flux of it through any closed surface is zero. FTP name this field that is caused by a moving point charge.
[EX A]:
Science