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.

One of these organic compounds is converted to an alkene by a diorganochromium compound in the Takai olefination. Compounds may be reduced to this functionality via the use of DIBAL-H (die-bahl aitch), and alkynes are formed by a reaction of these compounds with tetrabromomethane and triphenylphosphine named for Corey and Fuchs. When these organic compounds lack a hydrogen atom in the alpha position, their disproportionation can be induced by a base in the Cannizzaro reaction. These organic compounds are oxidized to carboxylic acids by a diamminesilver (I) complex, leading to the precipitation of metal onto the inside of the vessel, giving the positive "silver mirror" result of the Tollens test. For 10 points, name this special class of ketones with one R group being just hydrogen.
Science

When reacted with a nitrile, they produce an imine anion that can be hydrolyzed into a ketone, and they can cause nucleophilic ring opening of epoxides. Pouring a solution of them over dry ice followed by protonation results in carboxylic acids, which will not form addition products with these. One of their most common uses is reacting with aldehydes and ketones to form secondary and tertiary alcohols, respectively. Because they essentially act as carbanions, they can be protonated by weak acids to yield alkanes. FTP name these organometallic reagents that are formed by reacting an alkyl halide with magnesium, named for their French discoverer.
Science

One of his few surviving drawings for the design of St. Peters would have made it resemble the temple in the background of his The Expulsion of Heliodorus from the Temple. He was one of the last artists to use metalpoint for his numerous preparatory drawings. An early work of his, the Ansidei altarpiece, shows him beginning to develop a distinct style from his teacher, while his Wedding of the Virgin resembles the Delivery of the Keys, a famous work of his teacher (*) Perugino. The Parnassus and La Disputa are two of the frescoes in the Stanza della Signatura, perhaps his greatest achievement, while his only mythology piece, Galatea, was revered in later centuries as the epitome of the classical style. FTP, name this high renaissance painter who depicted his rival Michaelangelo in his The School of Athens.

Fine Arts