Detailed Instructions: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Problem:Question: Which wetland in the state of Tamil Nadu is the largest? Passage 1:On February 25, 1956, Khrushchev gave a clandestine speech to the Twentieth Party Congress of the Communist Party of the Soviet Union, which was entitled, "On the Cult of Personality and Its Consequences", which denounced Stalin and his protégés. Khrushchev charged Stalin with fostering a personality cult, despite maintaining support for the ideals of communism. The speech was highly critical of Stalin and his reign of terror, primarily denouncing the purges of the Soviet military and Communist Party, which had taken place during the latter part of the 1930s. The speech brought forth several accusations, notably those concerning the Moscow Trials, where rulings were made, based on forced confessions, which were obtained through torture. Judicial decisions were determined, based on liberal interpretations of Article 58 of the Russian SFSR Penal Code, which was introduced in 1927, in order to arrest individuals suspected of counter-revolutionary activities. Due process, in accordance with Soviet law, was often dismissed and replaced with summary proceedings issued by institutional commissions known as NKVD troikas, who issued sentences to the accused without representation, defense, or trial.
 Passage 2:Pallikaranai wetland is a freshwater marsh in the city of Chennai, India. It is situated adjacent to the Bay of Bengal, about south of the city centre, and has a geographical area of . Pallikaranai marshland is the only surviving wetland ecosystem of the city and is among the few and last remaining natural wetlands of South India. It is one of the 94 identified wetlands under National Wetland Conservation and Management Programme (NWCMP) operationalised by the Government of India in 1985–86 and one of the three in the state of Tamil Nadu, the other two being Point Calimere and Kazhuveli. It is also one of the prioritised wetlands of Tamil Nadu. The topography of the swamp is such that it always retains some storage, thus forming an aquatic ecosystem. A project on 'Inland Wetlands of India' commissioned by the Ministry of Environment and Forests, Government of India had prioritised Pallikaranai marsh as one of the most significant wetlands of the country. The marsh contains several rare or endangered and threatened species and acts as a forage and breeding ground for thousands of migratory birds from various places within and outside the country. The number of bird species sighted in the wetland is significantly higher than the number at Vedanthangal Bird Sanctuary.
 Passage 3:The previous season was one of the worst for LSU under Les Miles, matching the record of the 2008 LSU Tigers football team. The team did manage to sign the consensus #2 recruiting class in the country, including top rated recruits Leonard Fournette, Malachi Dupre, and Brandon Harris, all who made contributions during the season. After the bowl game, Defensive Coordinator John Chavis announced he was leaving LSU for the same position at Texas A&M. LSU hired former Alabama defensive coordinator Kevin Steele to fill the position, and subsequently hired former Ole Miss head coach Ed Orgeron to coach the defensive line. Former defensive line coach and ace recruiter Brick Haley departed for the same position at Texas in February.

Solution:
2