In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Input: Consider Input: Question: Which is the oldest ancient religious text that mentions Tripura? Passage:Although there is no evidence of lower or middle Paleolithic settlements in Tripura, Upper Paleolithic tools made of fossil wood have been found in the Haora and Khowai valleys. The Indian epic, the Mahabharata; ancient religious texts, the Puranas; and the Edicts of Ashoka stone pillar inscriptions of the emperor Ashoka dating from the third century BCE all mention Tripura. An ancient name of Tripura is Kirat Desh (English: "The land of Kirat"), probably referring to the Kirata Kingdoms or the more generic term Kirata. However, it is unclear whether the extent of modern Tripura is coterminous with Kirat Desh. The region was under the rule of the Twipra Kingdom for centuries, although when this dates from is not documented. The Rajmala, a chronicle of Tripuri kings which was first written in the 15th century, provides a list of 179 kings, from antiquity up to Krishna Kishore Manikya (18301850), but the reliability of the Rajmala has been doubted.
Links: a. Puranas b. Haora River c. Upper Paleolithic d. Khowai River

Output: a

Input: Consider Input: Question: Which Nobel Laureate had published more papers by the year Barschall emigrated to the US, Fritz Haber or Emil Fischer? Passage:Barschall was born as Heinrich Hermann Barschall in Berlin, Germany; his father was a patent attorney who had received a Ph.D. in chemistry after studying with Nobel Laureates Emil Fischer and Fritz Haber. After beginning study in several universities in Germany, he emigrated to the United States in 1937 during the early Holocaust period; though raised as a Lutheran, he had some Jewish ancestry. He received his Ph.D. from Princeton University in 1940 under the direction of Rudolf Ladenburg; he also worked closely with John A. Wheeler. After a suggestion by Niels Bohr, he carried out in only a few days with fellow graduate student Morton H. Kanner the first demonstration of fission by fast neutrons and thorium and uranium. His thesis was on the interaction of fast neutrons with helium. In a paper with John A. Wheeler he reported the discovery of spin-orbit coupling in neutron scattering.
Links: a. Fritz Haber b. Jews c. Nuclear fission d. Emil Fischer

Output: d

Input: Consider Input: Question: How many days did the battle last where James served against the Duke of Monmouth? Passage:The son of Thomas Butler, 6th Earl of Ossory and his wife Emilia (nee van Nassau-Beverweerd), and grandson of James Butler, 1st Duke of Ormonde, Butler was born in Dublin and was educated in France and afterwards at Christ Church, Oxford. On the death of his father on 30 July 1680 he became Baron Butler in the English peerage and Earl of Ossory by courtesy. He obtained command of a cavalry regiment in Ireland in 1683, and having received an appointment at court on the accession of James II, he served against the Duke of Monmouth at the Battle of Sedgemoor in July 1685. Having succeeded his grandfather as Duke of Ormonde on 21 July 1688, he was appointed a Knight of the Order of the Garter on 28 September 1688. In 1688 he also became Chancellor of Trinity College, Dublin and Chancellor of the University of Oxford.
Links: a. Order of the Garter b. James Butler, 1st Duke of Ormond c. Emilia Butler, Countess of Ossory d. Battle of Sedgemoor
Output: d