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.
Q: Question: Was the person Metzger did post-doctoral study with older than himself? Passage 1:The SaGa series was created by game designer Akitoshi Kawazu, whose credits prior to the franchise's introduction include Final Fantasy and Final Fantasy II. At a time when Nintendo's Game Boy was becoming popular worldwide due to the puzzle game Tetris, then-Square president Masashi Miyamoto requested that a development team create a game for the handheld console. Kawazu and fellow designer Koichi Ishii suggested that the company develop a role-playing video game, thus making Makai Tōshi Sa·Ga, later released in North America as The Final Fantasy Legend, the company's first handheld title. The gameplay was designed to be difficult, described by Kawazu as the main difference between the SaGa and Final Fantasy series. The character illustrations in all the games in the SaGa series were done by Tomomi Kobayashi, who has also done the illustrations for the MMORPG Granado Espada. Although the series has been long-running, as of 2008 none of the ten production teams at Square Enix is assigned to the franchise. Akitoshi Kawazu and Production Team 2 are devoted to the Final Fantasy Crystal Chronicles series.
 Passage 2:Metzger was born to a Jewish family in Mainz on March 23, 1932, to a hardware store owner and a homemaker. Some of his relatives perished in the Holocaust. At the suggestion of his sisters, Metzger's father moved to the United States in 1937, followed by his wife and sons in January 1938. Henry Metzger attended the Bronx High School of Science, as did his brother, then earned a bachelor's degree from the University of Rochester in 1953, followed by a medical degree at the Columbia University College of Physicians and Surgeons in 1957. Metzger completed his residency at Columbia Presbyterian Hospital, and joined the Public Health Service in 1959, through which he began working at the National Institutes of Health. After two years of post-doctoral study with Seymour Jonathan Singer, funded partly by the Helen Hay Whitney Fellowship, Metzger returned to the National Institutes of Health, working primarily in the National Institute of Arthritis and Musculoskeletal and Skin Diseases.
 Passage 3:The garden already existed at least in the early 18th century. During the Austrian occupation of northern Serbia 1717-39, several hospitals were established in Belgrade, including the Great military hospital. Based on the Austrian plans, the hospital was set outside of the Belgrade Fortress ("Danubian" or "German Belgrade"), in the Serbian part of the city. As shown on the map of Belgrade by Nicolas François de Spar, the Tsarigrad Road began at the Württemberg Gate (Stambol Gate), at the modern Republic Square, and headed towards "Marko's cemetery" in Tašmajdan. The hospital was situated on the road's right side, where the modern Stari Dvor is located. Behind the hospital there was a large garden, predecessor of the modern park, and further behind it, across the road was the military cemetery. Later "Marko's market" developed on the spot and today it is the area surrounding the House of the National Assembly of Serbia. After Austria lost the Austro-Turkish War of 1737–1739, the northern Serbia, including Belgrade, was returned to the Turks. One of the provisions of the 1739 Treaty of Belgrade stated that Austria had to demolish all the fortifications and military and civilian buildings it has constructed during the occupation. Many Baroque buildings were demolished. However, Austria didn't demolish the buildings outside of the fortress walls, including the Great military hospital, which, albeit as a ruin, survived until the next Austrian occupation in 1788.

A:
2