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For context, im at the end of year 12, and I’m considering switching one of my subjects (as my combination is not the strongest). I take maths, psych and geo and want to do psych at uni. I was thinking of switching geo for bio as it is a preferred subject for psych (I would either stay an extra year or try and learn AS during summer) and I do kinda regret geo. If I do decide to take bio though, it’s highly likely the grades i’ll come out with will be lower than if I stuck with geo. My current combination is fine for unis I have looked at (like i meet UCL’s preference of 2 ‘sciences’) and so my question is, is subject combination more important than grades (or vice versa)? As if I stick I can hopefully get A*A*A*, whereas if I took bio it would likely fall to A*AA or even A*AB. Should I go for bio to strengthen my combo, or stick with geo and come out with better grades?

For context, im at the end of year 12, and I’m considering switching one of my subjects (as my combination is not the strongest). I take maths, psych and geo and want to do psych at uni. I was thinking of switching geo for bio as it is a preferred subject for psych (I would either stay an extra year or try and learn AS during summer) and I do kinda regret geo. If I do decide to take bio though, it’s highly likely the grades i’ll come out with will be lower than if I stuck with geo. My current combination is fine for unis I have looked at (like i meet UCL’s preference of 2 ‘sciences’) and so my question is, is subject combination more important than grades (or vice versa)? As if I stick I can hopefully get A*A*A*, whereas if I took bio it would likely fall to A*AA or even A*AB. Should I go for bio to strengthen my combo, or stick with geo and come out with better grades?