Just pick subjects you enjoy doing - but to keep your A level options open pick a couple of more academic subjects like History since these help you with the essay skills you will need for your A levels. History would probably be slightly more relevant than Geography, but tbh just go with whichever you prefer. You are unlikely to require many specific GCSE subjects to study certain subjects at A level/ degree level - however check out your sixth form's requirements for subjects you may be interested in just in case.
It's quite early at this stage in your education to have a firm idea of what career you want to do, and so keeping your options open and picking subjects you enjoy is the most important thing. Also, try to pick those you are good at - when it comes to applying to university they are mainly interested in your overall GCSE grades more than the subjects...