Question: Which university is the third-largest university campus in the United States, Indiana University or Ohio State University?
Context: The Ohio State University Wexner Medical Center, formerly called The Ohio State University Medical Center (OSUMC), is a multidisciplinary academic medical center located in Columbus, Ohio, United States, on the main campus of The Ohio State University (OSU).  In 2010, the center was ranked one of "America's Best" by U.S. News & World Report in 11 specialties.  OSU Medical Center was the only central Ohio hospital ranked as "America's Best" in 2010.  However, as of 2016, the center's health-related programs garnered the best rankings of all at the medical center, including nursing-midwifery (#28), occupational therapy (#12), physical therapy (#10), and pharmacy (#6).  In 2016, OSUMC was ranked in 7 specialties, with only one medicine-related area breaking into the Top 15 rankings (ear, nose, and throat). Indiana University (IU) is a multi-campus public university system in the state of Indiana, United States.  Indiana University has a combined student body of more than 110,000 students, including approximately 46,000 students enrolled at the Indiana University Bloomington campus and approximately 31,000 students enrolled at the Indiana University – Purdue University Indianapolis (IUPUI) campus. The Indiana University Health Proton Therapy Center, formerly known as the Midwest Proton Radiotherapy Institute (MPRI), was the first proton facility in the Midwest.  The center was located on the Indiana University campus in Bloomington, Indiana, United States.  The IU Health Proton Therapy Center was the only proton therapy center in the U.S. to use a uniform-scanning beam for dose delivery, which decreases undesirable neutron dose to patients. Indiana University – Purdue University Fort Wayne (IPFW) is a coeducational public university in Fort Wayne, Indiana, United States.  Founded in 1964, IPFW is a cooperatively-managed regional campus of two state university systems: Indiana University and Purdue University.  IPFW enrolls 13,459 undergraduate and postgraduate students in nine colleges and schools, including a branch of the Indiana University School of Medicine.  IPFW offers more than 200 graduate and undergraduate degree programs through IU or Purdue universities.  The university's 14 men's and women's athletic teams compete in Division I of the NCAA Summit League and, since the 2016–17 school year, are known as the Fort Wayne Mastodons. The Ohio State University, Lima, also referred to as Ohio State Lima is a regional campus of Ohio State University located in Lima, Ohio.  Its 565 acre campus is located in Lima, 80 mi south of Toledo, Ohio.  It offers over 140 courses and 9 bachelor degree programs in science and liberal Arts.  Nine of eleven programs are four-year programs at Lima.  Two of them are baccalaureate completion programs.  In addition to regional accreditation, Ohio State Lima has baccalaureate program accreditation with NCATE.  Students can start at Lima and finish their degrees at The Ohio State University, Columbus with one of Ohio State’s 170+ majors.  The Ohio State University at Lima offers over 20 student clubs and organizations.  There are also 12 intramural and club athletic teams.  The Lima Campus Library has 76,000 volumes and 200+ journal subscriptions.  Library databases also provide access to thousands of online journals.  The University shares the campus with James A. Rhodes State College. The Ohio State University, commonly referred to as Ohio State or OSU, is a large, primarily residential, public university in Columbus, Ohio.  Founded in 1870 as a land-grant university and ninth university in Ohio with the Morrill Act of 1862, the university was originally known as the Ohio Agricultural and Mechanical College (Mech).  The college began with a focus on training students in various agricultural and mechanical disciplines but was developed into a comprehensive university under the direction of then Governor (later, President) Rutherford B. Hayes, and in 1878 the Ohio General Assembly passed a law changing the name to "The Ohio State University".  It has since grown into the third-largest university campus in the United States.  Along with its main campus in Columbus, Ohio State also operates a regional campus system with regional campuses in Lima, Mansfield, Marion, Newark, and Wooster. Vincennes University (VU) is a public university with its main campus in Vincennes, Indiana, in the United States.  Founded in 1801 as Jefferson Academy, VU is the oldest public institution of higher learning in the Northwest Territory and in Indiana.  In 1889, VU was chartered by the State of Indiana as a two-year university.  In 2005, VU began offering baccalaureate degrees in seven select areas, including education, nursing, technology, homeland security, and health information management.  VU's campus in Vincennes is a residential campus nestled along the banks of the Wabash River.  Other VU sites include a campus in Jasper, Indiana, the Center for Advanced Manufacturing and Logistics in Fort Branch, Indiana, along with centers for Aviation, Logistics, Advanced Manufacturing, and American Sign Language, in the Indianapolis area.  VU was chartered in 1806 as the Indiana Territory's four-year university and remained the state of Indiana's sole publicly funded four-year university until the establishment of Indiana University in 1820.  From 1999 to 2005, Vincennes University was in a state-mandated partnership with what became the Ivy Tech Community College. The Ohio State University at Mansfield is a regional campus of The Ohio State University located in Mansfield, Ohio.  It was founded in 1958 as a land-grant college.  Its 644 acre campus is situated in the western foothills of the Allegheny Plateau, the North Central Ohio region, with easy access to Columbus and Cleveland.  The campus offers seven bachelor degree programs and two master degree programs.  Students can start at Mansfield and finish their degrees at The Ohio State University, Columbus, with one or more of Ohio State’s 170 majors.  The Bromfield Library of the OSU mansfield campus provides access to all the resources of The Ohio State University and Ohio Link. The Ohio State Buckeyes field hockey team is the intercollegiate field hockey program representing Ohio State University.  The school competes in the Big Ten Conference in Division I of the National Collegiate Athletic Association (NCAA).  The Ohio State field hockey team plays its home games at Buckeye Varsity Field on the university campus in Columbus, Ohio.  Since the establishment of the field hockey program in 1971, the Buckeyes have won three Big Ten conference regular-season championships, one conference tournament title, and have appeared in the NCAA tournament seven times.  The team is currently coached by Anne Wilkinson. Ohio Stadium, also known as the Horseshoe, "the Shoe", and "the House that Harley built", is an American football stadium in Columbus, Ohio, United States, on the campus of The Ohio State University.  Its primary purpose is the home venue of the Ohio State Buckeyes football team and the Ohio State University Marching Band; it also serves as the site for the university's Spring Commencement ceremonies each May.
Answer: Ohio State University