English. As far as dental schools are concerned, they don't really prefer science majors that much over non-science. 2/5 of my classes have non-science majors. If you want to look like the other 10000 bio major out there, please be my guest. However, don't pick a major because you THINK it's going to help you. Pick a major you like, and hopefully do well in. Surprisingly, you don't need that many courses to fulfill your dental requirements.