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]: When it interacts with ryanodine receptors, this element upregulates its own release, and this compound forms the cell plates of coccolithophores. Stimulation of Gq ("g-sub-q") opens a channel that allows for this ion's movement, and proteins that bind this ion have an EF hand motif. Cellular concentrations of this ion are regulated by IP3. Parafollicular cells of the (*) thyroid produce a compound that reduces the concentration of this ion in blood, and its intestinal absorption requires vitamin D. This ion interacts with Troponin to stimulate muscle contraction, and the lumens of sarcoplasmic reticula have high concentrations of this ion. For 10 points, name this divalent cation that is stored in bones.
[EX A]: Science

[EX Q]: This author wrote about a girl who refuses to throw away a chicken sandwich in "Just Before the War With the Eskimos. " Another work by this author features a boy with "rickets in one leg and elephantiasis in other" fishing next to a "No Fishing! " sign while in Montreal. "The Chief" tells members of the "Comanche Club" a story about a deformed criminal named the "Laughing Man" in one of his works. Another work by this man sees the central character chat with Sibyl on the beach before shooting himself in the head. For 10 points, name this creator of Seymour Glass in "A Perfect Day for Bananafish," who wrote about Holden in The Catcher in the Rye.
[EX A]: Literature

[EX Q]: One character keeps her mother Nivea's decapitated head in a hatbox and later predicts the earthquake that destroys Tres Marias. Another character befriends Transito Soto at the Red Lantern brothel and has twin boys, Jaime and Nicolas. After becoming pregnant, Blanca is forced to marry Jean de Satigny, but she returns to her lover Pedro Tecero after the birth of her daughter Alba. Alba is later arrested and tortured by Esteban Garcia, but the ghost of her grandmother Clara helps her endure the torture. Telling the story of Esteban and his clairvoyant wife Clara, FTP, name this novel about the Trueba family by Isabel Allende.
[EX A]:
Literature