Personally unless you are sure you want to go into something medicine based i wouldnt do all the sciences, ive been told together they are so difficult and you will have an endless work load, unless thats what you want? I dont beleive that for any other of the list you have to do anything specific at A level? I might be wrong, i did psychology, History and Law at A2 all of which are pretty much essay based, if you are unsure id probably go for English, you might suprise yourself!
Remember medicine is a course thats very high in demand, youd need to know pretty soon into the year to start getting things that look desirable on your personal statement and the submition date is earlier than others, and its pretty competitive, good luck with whatever you decide 😄😄
Wouldnt do the Art though 4 A levels are enough especially if you want to do all 4 at A2, think of how stressed youll be around exams with around 8 exams all close together and Art work due in😣