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.

Ex Input:
Question: Which group was organized the earliest, the 1st King's Dragoon Guards or the 2nd Dragoon Guards (Queen's Bays)? Passage:The 1st King's Dragoon Guards was a cavalry regiment in the British Army. The regiment was raised by Sir John Lanier in 1685 as the 2nd Queen's Regiment of Horse, named in honour of Queen Mary, consort of King James II. It was renamed the 2nd King's Own Regiment of Horse in 1714 in honour of George I. The regiment attained the title 1st King's Dragoon Guards in 1751. The regiment served as horse cavalry until 1937 when it was mechanised with light tanks. The regiment became part of the Royal Armoured Corps in 1939. After service in the First World War and the Second World War, the regiment amalgamated with the 2nd Dragoon Guards (Queen's Bays) in 1959 to form the 1st The Queen's Dragoon Guards.
 Links: a. British Army b. 1st The Queen's Dragoon Guards c. 2nd Dragoon Guards (Queen's Bays) d. British Army

Ex Output:
c


Ex Input:
Question: How many regular NHL seasons had there been before the 1999-2000 hockey season? Passage:Before the 1999–2000 NHL season Torchetti was hired as an assistant coach for the Tampa Bay Lightning under Steve Ludzik. In 2002 Torchetti was hired as head coach of the San Antonio Rampage. Due to his many coaching stints in the city, "Torch" has kept close ties to San Antonio. After 65 games he was promoted to assistant coach with the parent club, the Florida Panthers. In 2004, he served 27 games as interim head coach, replacing Rick Dudley. He finished with a 10–12–4–1 record before being replaced by Jacques Martin. During the 2005–06 NHL season, Torchetti was hired by Dave Taylor as interim head coach of the Los Angeles Kings. With a chance to clinch a playoff spot, he had a 5–7 record in the team's final 12 games and was not retained by the Kings, instead being replaced by Marc Crawford.
 Links: a. 1999–2000 NHL season b. 1999–2000 NHL season c. Florida Panthers d. 2005–06 NHL season

Ex Output:
a


Ex Input:
Question: Which of the two trading partners of the port of Karachi in the eighteenth century has the largest population now? Passage:The Manora Island and was visited by Ottoman admiral Seydi Ali Reis and mentioned in his book Mir'ât ül Memâlik in 1554. According to the British historian Eliot, parts of city of Karachi and the island of Manora at port of Karachi constituted the city of Debal. The island was the site of a small fort constructed in the eighteenth century when the port of Karachi traded with Oman and Bahrain. The Kalmati Baloch tribe was settled in Karachi and they raised an army to defend the port from the British invasion. The Kalmati forces were defeated when the Manora Fort was stormed by the British in 1839 because of the strategic location of Karachi. Although the fort is now buried beneath the naval base, the lighthouse is a visible reminder of the British presence having been built in 1889 by the Canadian engineer Alain-Chartier-de-Lotbiniere Joly de Lotbinière to assist vessels approaching Karachi harbor.
 Links: a. Oman b. British Raj c. Oman d. Ottoman Empire

Ex Output:

a