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.

Rosenheim and Callow developed a test in which a mixture of this compound and metal acetates are used to detect the presence of sterols. Millon's reagent is a solution of mercury in this substance and a similar substance, which turns red in the presence of phenolic compounds and is useful in detecting tyrosine residues. The commercial production of this compound begins with the combustion of ammonia using a platinum-rhodium catalyst; that process is the Ostwald process. For 10 points, identify this acid which is found with hydrochloric acid in aqua regia, and has chemical formula HNO3.
Science

This work contains the lines, "The swallow tittering from the straw-built bed, the cock's shrill clarion, or the echoing horn, no more shall rouse them from their lowly bed" before claiming that "Full many a gem of purest ray serene the dark unfathom'd caves of ocean bear". Another section of this work discusses how "Knowledge to their eyes her ample page, rich with the spoils of time, did ne'er unroll" and "beneath those rugged elms, that yew tree's shade, where heaves the turf in many a mouldering heap, each in his narrow cell for ever laid". This work begins with the lines, "The curfew tolls the knell of parting day, the lowing herd winds slowly o'er the lea". For 10 pointsname this poem by Thomas Gray.
Fine Arts

Through his daughter, who was forcibly married to Rhacius, this man became the grandfather of the\n champion diviner Mopsus. He was also the father of the woman who allowed Alcmene to give birth to\n Heracles by scaring away certain witches; that daughter was named Historis. This man lived for at least\n seven generations, and after his death from drinking the waters of Telphussa, he advised against harming\n the cattle of Helios. After killing a snake, he was transformed into a woman for seven years, and he later\n was punished for saying women enjoy sex more by being blinded. For 10 points, name this prophet of\n Thebes, who revealed Oedipus as the murderer of Laius.

Social Science