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.

Question: How old was Lord Cornwallis the year that he sent Alexander Ross home with the despatches of the Battle of Camden? Passage 1:Lieutenant Ross became captain on 30 May, and served with distinction throughout the American war of independence. He was aide-de-camp to Lord Cornwallis and was sent home by him with the despatches of the Battle of Camden on 16 Aug. 1780. He was made major in the 45th Regiment of Foot on 25 October 1780. He represented Lord Cornwallis as commissioner in arranging the details of the surrender of Yorktown. In May 1782 he was sent to Paris to arrange for the exchange of Lord Cornwallis, which was only effected by the peace of 20 January 1783. In August 1783 Ross was appointed deputy adjutant-general in Scotland, with the rank of lieutenant-colonel, and he served in a similar capacity in India under Lord Cornwallis. He became colonel on 12 October 1793. In August 1794 he went with Earl Spencer and Thomas Grenville to Vienna on a special mission to arrange that Lord Cornwallis should command the allies against the French. Their efforts were unsuccessful. He accompanied Lord Cornwallis as major-general to Warley camp in April 1795, and two months later was nominated Surveyor-General of the Ordnance in succession to George Cranfield Berkeley.
 Passage 2:The 2011 Iowa State Cyclones football team represented Iowa State University in the 2011 NCAA Division I FBS football season. The Cyclones were led by third year head coach Paul Rhoads and play their home games at Jack Trice Stadium. They are a member of the Big 12 Conference. The conference play began with a loss at home to the Texas Longhorns, and ended with a loss at Manhattan, Kansas to the Kansas State Wildcats in the Farmageddon series, with a 3–6 record. The season will likely be remembered for the game against then #2 Oklahoma State Cowboys, who the Cyclones upset in a double-overtime thriller throwing the BCS into "utter chaos" as dubbed by sports media. The Iowa State squad was invited to the first Pinstripe Bowl game, which they were defeated by Rutgers, and the Cyclone's 2011 season came to a close with 6–7 overall record, 3–6 in Big 12 play, finished 8th place.
 Passage 3:After her professional debut in 1831, Brambilla initially sang in several smaller opera houses in northern Italy but in 1833 scored a considerable success at Milan's Teatro Carcano singing Agnese in Bellini's Beatrice di Tenda and the leading soprano role in Fioravanti's Le cantatrici villane. She then appeared on Russia at the Odessa Opera House, which at the time specialised in Italian opera. Upon her return to Milan in 1837, she sang with her sister Marietta at La Scala in the world premiere of In morte di Maria Malibran de Bériot, a cantata in memory of Maria Malibran composed by Gaetano Donizetti, Giovanni Pacini, Saverio Mercadante, Nicola Vaccai and Pietro Antonio Coppola. After singing in Barcelona, she returned to La Scala for the 1839/1840 season in Mercadante's Le due illustri rivali and the world premieres of Mazzucato's I corsari and Coccia's Giovanna II.
1