PR is something you can pick up on the job. You don't need to STUDY PR to get into PR. You can study advertising, marketing, journalism or even something non-related like Political Science, Business Administration. PR agencies look for diversity.
Besides, you can't really study PR. PR is made up of social skills(you know whether you got it or not),a creative imagination(you need that to create various story angles for your client),patience(you need that when explaining to a client who manufactures toys why they will never be featured in a wine and dine publication), a good grasp of MS Office(a requirement in most jobs), helps if you know a bit of Photoshop but not a must,aware of all the latest trends in consumer behaviour and last but not least concise writing skills. Journos hate long winded press releases, better be as succint as you can and put additional information in fact sheets or backgrounders.