Paul attended Baylor University from fall 1981 to summer 1984 and was enrolled in the honors program. During the time he spent at Baylor, he was involved in the swim team and the Young Conservatives of Texas and was a member of a secret organization known as the NoZe Brotherhood. Paul also regularly contributed to The Baylor Lariat. Paul left Baylor early, without completing either his Bachelor’s degree in biology or in English, when he was accepted into the Duke University School of Medicine. At the time, Duke did not require an undergraduate degree for admission to its graduate school. He earned a M.D. degree in 1988 and completed his residency in 1993.
Source: Wikipedia
But since medicine is the study of human biology along with many other areas of study, I think Senator Paul is correct.
Seems close enough. Technically he should have said “majored in” but BFD, we’ve got bigger issues to worry about.