Question: What division of the Nash-Kelvinator Corporation , produced a North American automobile, that At the time merged Hudson Motor Car Company, it was the largest corporate merger in U.S. history?

Context paragraphs:
Hudson Motor Car Company: The Hudson Motor Car Company made Hudson and other brand automobiles in Detroit, Michigan, from 1909 to 1954.  In 1954, Hudson merged with Nash-Kelvinator Corporation to form American Motors (AMC).  The Hudson name was continued through the 1957 model year, after which it was discontinued.

Nash Rambler: The Nash Rambler is a North American automobile that was produced by the Nash Motors division of Nash-Kelvinator Corporation from 1950 to 1954.  On May 1, 1954, Nash-Kelvinator merged with the Hudson Motor Car Company to form American Motors Corporation (AMC).  The Nash Rambler was then built by AMC in Kenosha, Wisconsin through 1955.

Hudson Wasp: The Hudson Wasp is an automobile that was built and marketed by the Hudson Motor Car Company of Detroit, Michigan, from the 1952 through the 1956 model years.  It was also assembled in Australia from complete knock down (CKD) kits.  After Hudson merged with Nash Motors, the Wasp was then built by American Motors Corporation in Kenosha, Wisconsin, and marketed under its Hudson marque for model years 1955 and 1956.

Virginia and Truckee Railway Motor Car 22: Virginia and Truckee Railway Motor Car 22, also called McKeen Motor Car 70, is a gasoline-powered railcar at the Nevada State Railroad Museum in Carson City in the U.S. state of Nevada.  It was built for the Virginia and Truckee Railroad in 1910 by the McKeen Motor Car Company.  Motor Car 22 was operated by the Virginia and Truckee until 1945, when it was sold off and became a diner until 1955.  It eventually became the office and storage space for a plumbing business before it was donated to the Nevada State Railroad Museum in 1995.  After a thorough study, the Museum undertook a restoration of the McKeen car in 1997.  The restored motor car was unveiled in 2010, a century after it was originally delivered to the Virginia and Truckee.  Motor Car 22 was listed on the National Register of Historic Places in 2005, and designated a National Historic Landmark in 2012.  It is one of a few surviving McKeen railcars, and the only one that is operational.

Wonder Motor Car Company: The Wonder Motor Car Company was a very short lived car company in 1909 that was derived from the Kansas City Motor Car Company as a last ditch effort to stay in business and continue car production.  The Kansas City Motor Car Company which made cars and trucks from 1905 to 1909 was itself derived from the Caps Brothers Manufacturing Company that briefly made cars in 1905.  No examples of any Caps Brothers, Kansas City, or Wonder cars or trucks are known to exist today.

Chevrolet: Chevrolet ( ), colloquially referred to as Chevy and formally the Chevrolet Division of General Motors Company, is an American automobile division of the American manufacturer General Motors (GM).  Louis Chevrolet and ousted General Motors founder William C. Durant started the company on November 3, 1911 as the Chevrolet Motor Car Company.  Durant used the Chevrolet Motor Car Company to acquire a controlling stake in General Motors with a reverse merger occurring on May 2, 1918 and propelled himself back to the GM presidency.  After Durant's second ousting in 1919, Alfred Sloan, with his maxim "a car for every purse and purpose," would pick the Chevrolet brand to become the volume leader in the General Motors family, selling mainstream vehicles to compete with Henry Ford's Model T in 1919 and overtaking Ford as the best-selling car in the United States by 1929.

American Motors: American Motors Corporation (AMC) was an American automobile company formed by the 1954 merger of Nash-Kelvinator Corporation and Hudson Motor Car Company.  At the time, it was the largest corporate merger in U.S. history.

Howard E. Coffin: Howard Earle Coffin (September 6, 1873 – November 21, 1937) was an American automobile engineer and industrialist.  He was one of the founders of the Hudson Motor Car Company with Roy D. Chapin.  He was a charter member of The Society of Automotive Engineers and president in 1910, and as one of the "dollar-a-year men" served as chairman of the Aircraft Board which organized aircraft production and industrial mobilization during World War I.  He retired from the Hudson company in 1930 but acted as a consultant.  He died accidentally in 1937.

Roy D. Chapin Jr.: Roy Dikeman Chapin Jr. (September 21, 1915 – August 5, 2001) was the Chairman and Chief Executive Officer of American Motors Corporation (AMC).  Chapin's father, Roy D. Chapin Sr., was one of the co-founders of the Hudson Motor Car Company; Hudson later merged with Nash-Kelvinator Corporation in 1954 to form American Motors.  Roy D. Chapin Jr. was instrumental in introducing many successful lines of cars by American Motors that included the Gremlin, Hornet, and Javelin, as well as the purchase of Kaiser Jeep by the automaker.

American Motors Incorporated: American Motors Incorporated (AMI) designed, manufactured, and sold a mini-van for commercial delivery use.  This company was not related to the American Motors Corporation (AMC), a major automaker formed in 1954 by the merger of the Nash-Kelvinator Corporation and the Hudson Motor Car Company.

Supporting paragraphs: Nash Rambler American Motors
Answer: Nash Motors division