What A level pairing would be best for Pharmacy and Dentistry

Most courses only ask for Chemistry and Biology. A few courses prefer Maths in conjunction with that, however a solid grade in Chemistry and Biology as well as work experience and such can get you accepted into most courses, for both Dentistry and Pharmacy. I would personally find Maths very fitting, however that comes from the perspective of someone who is confident in that subject. If you are sceptical of it, I would advise against it as most entry requirements for these courses start at AAB at the lowest, meaning you're practically competing with straight A and A* students. If choosing Maths puts you in a compromising position then I would do Geography and just get a very solid personal statement and work experience. Maths can come naturally to some people and not so much to others. It's a lot of hard work to get a high grade in it if you didn't do great at GCSE at the bare minimum.