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 reaction is combined with an aldol condensation to produce cyclohexenones in a process named for Robinson, and a variation of this uses silyl ethers and titanium tetrachloride, in a reaction named also for Mukaiyama. In a process analogous to this reaction, performed with simple ketones, the equilbrium is shifted towards the reagents, unlike in the Claisen and aldol condensations, necessitating the use of an enolate in conjugate addition to produce the 1,4-addition. For 10 points, what is this reaction named for an American chemist, which consists of the addition of a carbanion to an alpha, beta unsaturated carbonyl
[A]: Science


[Q]: composer of this opera was convinced to pursue it by his friend Sybil Seligman, who commissioned a translation of its text. At one point, a character reads the Fifty-first Psalm of David, though the original text had a book entitled "Old Joe Miller's Jokes. " Another character expresses frustration in the first act by declaring "Che terra maledetta," after which the romantic conflict is established by the aria "Chi c'e per farmi I ricci" In the second act, another character's knowledge of Nina Micheltorena is asked into by Ashby, and later that character sings the aria "Ch'ella mi creda libero. " Based on a play by David Belasco, it also features Wowkle and Billy, who are urged to marry in a church, and Jim Larkens who simply longs to go home. Ramirez is the secret identity of Dick Johnson, who is saved by his beloved Minnie. FTP, name this opera set in the American west, by Puccini.
[A]: Fine Arts


[Q]: Loewner's inequality relates the area and systole of Riemannian metrics on one of these spaces. Arnold's cat map is a chaotic mapping from one of these spaces to itself. This name is given to connected, compact, abelian Lie subgroups, and any compact Lie group has a maximal one. Dupin cyclides are geometric inversions of these objects, and two Villarceau circles can be created by cutting one of these objects diagonally. N-dimensional versions of these objects, which have genus one, are homeomorphic to the Cartesian product of N circles. Other than the Klein bottle, these are the only closed, compact surfaces with an Euler characteristic of zero. They can be created by revolving a circle around an axis coplanar to the circle's diameter. For 10 points, name these mathematical objects that often look like doughnuts.
[A]:
Science