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.

[Q]: This element's only oxidation state is -1, and it is impossible to free from its compounds by chemical means. It is prepared commercially be the same method which Henri Moisson used to isolate it in 1886, and is also found in the mineral cryolite. Its only isotope is the stabe 19 version, and in its gaseous form takes on a pale yellow color. The most electronegative and reactive of the elements, FTP, what is this lightest of the halogens with atomic number 9 and symbol F
[A]: Science


[Q]: In one of this mans plays, the crippled Major Magnus Muldoon turns out to be his own half-brother Albert in disguise. Another of his plays features a singer-actress who retired after seeing TV reports of a moon landing. The title character is identified as the third-string critic Puckeridge after Moon joins the action onstage in this mans The Real Inspector Hound, and Inspector Bones reveals that he is a big fan of Dotty Moore in his play Jumpers. A teenage girl named Thomasina predicts the heat death of the universe in one of his plays, and the title characters of another of his plays watch a rehearsal of The Murder of Gonzago. FTP name this author of Arcadia and Rosencrantz and Guildenstern Are Dead.
[A]: Literature


[Q]: The Gatterman-Koch reaction adds carbonyl groups to derivatives of this molecule, which when substituted with a hydroxyl group can undergo the Pechmann condensation to synthesize coumarins. The ANRORC mechanism is used to describe certain types of nucleophilic substitutions in it, and reacting it with sodium and an alcohol in liquid ammonia will selectively reduce it in a reaction named for Birch. It readily undergoes the Lewis acid-catalyzed Friedel-Crafts acylation, and simple derivatives of it include aniline and toluene. For 10 points, identify this chemical compound with molecular formula C6H6, whose structure was elucidated by Kekul.
[A]:
Science