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]: The lemma named for this person states that if a prime number divides a product, then it divides a factor of that product. Janos Bolyai and Nikolai Lobachevsky developed a system that was notable for not following all of this person's rules. A so-called orchard is named for this person because of his algorithm for finding greatest common divisors. A book he wrote states that if a line segment intersects two lines, then the lines meet on the side of the segment where the interior angle sum is less than two right angles, the last of his five postulates. Name this mathematician whose Elements was a standard text of geometry.
[EX A]: Science

[EX Q]: This compound promotes the dephosphorylation and activation of enzyme HMG-CoA to favor cholesterol synthesis and a phenylalanine for leucine substitution at residue B25 results in its "Chicago" variety. Its biosynthesis involves an excision of the C-peptide, and the compound functions by binding to tyrosine kinase receptors on cell surfaces. Sanger's improvement upon the methods of Edman degradation involved its sequencing, and its production occurs primarily in beta cells on the islets of langerhans. For ten points, name this pancreatic counterpart of glucagon used to regulate blood sugar, deficiencies of which are found in sufferers of diabetes.
[EX A]: Science

[EX Q]: Flurprimidol and ancymidol are two chemicals that inhibit synthesis of these compounds, whose precursors include ent-kaurene. PIF3/4 is a transcription factor whose activity is regulated by these compounds through their promotion of ubiquitination of DELLA proteins. A bioassay for these compounds using barley endosperm relies on their stimulation of hydrolytic enzymes in germinating cereal grains. Teijiro Yabuta and Eiichi Kurosawa named and discovered these compounds during studies of foolish seedling disease. For 10 points, name this class of plant hormones that break dormancy and stimulate cell elongation.
[EX A]:
Science