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.

[Q]: Question: What was the real name of the wrestler Buffalo defeated in order to win his first title in Osaka Pro? Passage:In April 1999, Yamada joined the Osaka Pro Wrestling promotion, where he began wrestling under a mask as Black Buffalo, a character inspired by the Osaka Kintetsu Buffaloes baseball team. He made his debut for the promotion at its first event on April 29, where he, Dick Togo and Violencia, forming the villainous alliance Legion of Violence (LOV), were defeated in a six-man tag team main event by Masato Yakushiji, Naohiro Hoshikawa and Super Delfin. Buffalo kept teaming with Togo for the rest of the year. On November 21, Buffalo won his first title in Osaka Pro, when he defeated Super Delfin for the UWF Super Welterweight Championship, only to lose it back to him seven days later. In early 2000, LOV was joined by Daio Quallt and Policeme~n, replacing Violencia. On May 1, Buffalo and Togo defeated Super Delfin and Super Demekin in the finals to win the 1st Anniversary Tag Tournament. In September, Buffalo took part in the inaugural Tenno-zan tournament, where he made it to the semifinals, before being eliminated by Super Delfin. After Dick Togo left Osaka Pro at the end of 2000, LOV was disbanded and replaced by the new group, FLUXxx, as a member of which Buffalo formed a new tag team named Infinity with Tsubasa. After reaching the semifinals of the 2001 Osaka Tag Festival, Buffalo and Tsubasa defeated Super Delfin and Takehiro Murahama on July 21 to win the vacant Osaka Pro Wrestling Tag Team Championship. They would lose the title to Murahama and Kaiju Zeta Mandora on August 24. The following October's Tenno-zan saw a repeat of the previous year's tournament as Buffalo was eliminated in the semifinals by Super Delfin. On January 27, 2002, Buffalo, Tsubasa and Gamma defeated Super Delfin, Super Demekin and Takehiro Murahama to win the Trios Cup Tournament. On August 25, Buffalo and Tsubasa regained the Osaka Pro Wrestling Tag Team Championship by defeating the Kishiwada Gurentai (Big Boss MA-G-MA and Daio Quallt). After a five-month reign, they would lose the title to Jyushin Thunder Liger and Takehiro Murahama on February 1, 2003.
 Links: a. Magnitude Kishiwada b. Super Delfin c. Super Delfin d. Super Delfin
[A]: b


[Q]: Question: How many years did the owner of the private observatory live? Passage:It would seem that Gill's interests lay elsewhere since after a few years he sold the business, and then spent time equipping Lord Lindsay's private observatory at Dun Echt, Aberdeenshire. In 1874, Gill joined the expedition to Mauritius to observe the transit of Venus. Three years later he went to Ascension Island to observe a near approach of Mars and to calculate its distance. While carrying out these laborious calculations, he was notified of his appointment to the Cape Observatory, which, over the following 27 years he was to refurbish completely, turning it into a first-rate institution. Gill was a meticulous observer and had a flair for getting the best out of his instruments. His solar parallax observations with a heliometer and his calculations of distances to the nearer stars, are testimony to his outstanding work. He recruited Robert Innes to the Cape Observatory.
 Links: a. South African Astronomical Observatory b. Aberdeenshire (historic) c. James Lindsay, 26th Earl of Crawford d. South African Astronomical Observatory
[A]: c


[Q]: Question: Which of the counties where Henry was excluded from obtaining land has a larger population? Passage:Henry I Kőszegi, a significant figure of the era of so-called "feudal anarchy", was killed in the Battle of Föveny in September 1274. His power and wealth in Western Transdanubia were largely inherited by his two elder sons, Nicholas and Ivan, who divided their heirdom and the most valuable domains among themselves in 1279. Henry was excluded from the contract, only his wine growers were mentioned, to whom they were assigned certain vineyards in Moson and Pozsony counties. Historians János Karácsonyi and Attila Zsoldos considered Henry was granted lands in Slavonia from his brothers sometime before 1279, during an unequal sharing; his first lands laid in Varaždin County, the northwestern part of the province. There, it is presumable, he owned the castles of the late "Farkas of Zagorje" from the beginning, including Krapina (Korpona). Subsequently, the forts of Belec, Kostel, Vrbovec (Orbolc) and Oštrc (Oszterc) also belonged to his branch's property, but the time and circumstances of their acquisition are unknown. From these lands and castles on the southwestern corner of the kingdom, Henry expanded his influence over the territory, which was ruled by Joachim Gutkeled prior to that, between the rivers Drava and Sava (called Slavonia superior, "Upper Slavonia"), in the upcoming decades, and was considered the most powerful lord in the region by the extinction of the Árpád dynasty in 1301. For instance, he acquired the castles of Susica (later Szentgyörgy, present-day Đurđevac in Croatia) and Koprivnica (Kapronca) in Križevci County. During their family contract, Nicholas and Ivan did not renounce the possibility of their expansion into Slavonia, they both possessed landholdings and castles in the province too. In their agreement at Dubica on 20 April 1278, the Kőszegis and the Babonići divided the spheres of interest in Slavonia between each other. Henry and his brothers renounced territorial claims from all areas south of the river Sava (Slavonia inferior, "Lower Slavonia") in favor of Stephen Babonić and his clan, who acknowledged the Kőszegis' power north of the river at the same time.
 Links: a. Hrvatska Dubica b. Transdanubia c. Moson County d. Drava
[A]:
c