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]: Halogen addition to them creates a mixture of a 1-2 and 1-4 addition product. One preparation of them involves butane undergoing thermal dehydration. Another synthesis of the conjugated variety of this chemical group involves elimination of unsaturated alcohols and alkyl halides. They include a number of useful reagents, including ones named for Chan, Dane, Brassard, Rawal, and Danishefsky. In addition to the conjugated variety, they also occur in isolated and cumulated varieties. Conjugation energy guarantees that the conjugated form is the most stable. For ten points, what is this organic functional group whose 1,3 variety are a principal reactant in the Diels-Alder reaction, and which is characterized by a pair of double bonds.
[EX A]: Science

[EX Q]: The operas Fierrabras and Alfonso and Estralla are among the works of this composer, whose four-handed piano works include his "Grand Duo" sonata and his Fantasia in F minor. This composer of the piano trio Notturno chose to double the cellos in his string quintet in C major, while another of his works utilized another work of his previously based on a poem by Matthias Claudius. This composer of the "Death and the Maiden" quartet also wrote the incidental music to Rosamunde and utilized both the double bass and the piano in a work describing its title creature eluding a fisherman. FTP, name this Austrian composer of the Trout Quintet, several lieder, and his eighth and "Unfinished" Symphony.
[EX A]: Fine Arts

[EX Q]: Some of this man's most recent work includes the Museum of Islamic Art in Qatar. Five blocky sand-colored towers are seen in this architect's National Center for Atmospheric Research, and he worked alongside Henry Cobb and James Freed to design a building emulating a racetrack. Besides the(*) NASCAR Hall of Fame, this man designed a Boston building where the windows occasionally fell off, the John Hancock Tower, as well as the Rock and Roll Hall of Fame. For 10 points, name this Chinese American known for his glass pyramid at the Louvre.
[EX A]:
Fine Arts