Which car manufacturer is associated with the name Nissan?

The name Nissan is directly associated with the car manufacturer itself, as it is both the name of the brand and the manufacturer. Nissan is a well-known Japanese automotive company that has a significant presence in the global automobile market, producing a wide range of vehicles, including sedans, SUVs, and electric cars.

The other options listed—Oldsmobile, Plymouth, and Pontiac—represent different automotive brands that are not connected to Nissan but rather are associated with American automotive history. Oldsmobile and Pontiac were divisions of General Motors, while Plymouth was a division of Chrysler. Therefore, these brands are distinctly separate from Nissan, which is the correct association.