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 of the rifle divisions that Kazakevich served was the largest? Passage 1:In August 1915, after recovering from his injuries, Elles was one of three officers specially selected by General Sir William Robertson, soon to be Chief of the Imperial General Staff (CIGS), the professional head of the British Army, to liaise with troops at the front and pass the information directly to the British General Headquarters (GHQ). In January 1916, as a General Staff Officer (GSO), Elles was sent by General Sir Douglas Haig, the Commander-in-Chief (C-in-C) of the BEF on the Western Front, to investigate the first tanks or "caterpillars" being built in England. He attended the first trials of "Mother" and reported back to Haig on its success. During the summer of 1916, he was tasked to report back from the Somme, where the tanks were first used. Elles was appointed to head the Heavy Branch (the first tank units) of the Machine Gun Corps in France on 29 September 1916, with the temporary rank of colonel. His responsibilities included its advanced training and tactical employment. He also commanded the large central depot and workshops established near Bermicourt.
 Passage 2:He was born in Brunswick to Congregationalist minister Abraham Isaac and Mary Judd. He attended state schools and became a schoolteacher, working for the Victorian Education Department from 1900. On 3 September 1907 he married Elizabeth Brown, with whom he had four children. In 1913 he was appointed a supervisor of school gardening, and pioneered several early initiatives in this area. During World War I he served with the 58th Battalion, and after the war he spent time in England studying horticulture. He ran a nursery at Noble Park from 1922. From 1928 to 1931 and 1937 to 1940 he was a member of Dandenong Shire Council, and he was also chairman of Associated Nurseries Pty Ltd from 1932 to 1965 and president of the Nurserymen and Seedsmen's Association from 1936 to 1937. In 1940 he was elected to the Victorian Legislative Council as a United Australia Party member for South Eastern Province. While in the Council he ran a Save the Forests campaign, which evolved into the National Resources Conservation League in which Isaac played a leading role. He lost Liberal and Country Party endorsement in 1952 and was defeated running as an independent candidate. In 1956 he was appointed an Officer of the Order of the British Empire. Isaac died at Footscray in 1965.
 Passage 3:Daniil Vasilievich Kazakevich (Russian: Даниил Васильевич Казакевич; 16 December 1902 – 28 November 1988) was a Belorussian Soviet Lieutenant general and Hero of the Soviet Union. Kazakevich was drafted into the Red Army in 1920 and fought in the Polish–Soviet War. In 1923 he transferred to the Soviet Border Troops. Kazakevich became an officer and by 1939 was chief of staff of a border district in the Soviet Far East. In December 1942 he became chief of staff of the Far Eastern NKVD Rifle Division, which became the 102nd Rifle Division some months later. After fighting in Operation Kutuzov, Kazakevich was given command of the 399th Rifle Division in September 1943. Kazakevich led the division through the Battle of the Dnieper, Operation Bagration and the East Prussian Offensive. He was awarded the title Hero of the Soviet Union for his leadership in the battle for the Narew bridgeheads during September 1944. Postwar, Kazakevich returned to the Border Troops and led the Moldovan and Southwestern Border Districts. After a two-year period as an advisor to the East German Border Troops, Kazakevich became chief of the Border Troops military educational institutions. He retired in 1959 and lived in Moscow, working in the Intourist Directorate.

Solution:
3