Which of the following is not an Ivy League University?

Stanford is not an Ivy League university because it is not one of the eight institutions that form the Ivy League. The Ivy League is a collegiate athletic conference in the northeastern United States, consisting of Harvard University, Yale University, Princeton University, Columbia University, Brown University, Cornell University, Dartmouth College, and the University of Pennsylvania. Although Stanford is a highly prestigious and academically renowned institution, it is located on the West Coast and is not part of the Ivy League conference.