HELPPPP

I am a private candidate, I will be studying a level biology chemistry and physics.
I have the option to sit one of these subjects in 2024 and the other 2 in 2025.
Which one should I do in 2024? (With only 7 months of studying)

It would be more sensible to not try to rush any of them in just seven months. Why not do all three over the normal three-year timeframe? How do you benefit by doing one of them early?

3 year time frame? A levels are taken after 2 years of study, in my case I will try to do them in 1 year and few months. I do have reasons for that I just need to know if its doable

Sorry. Typo. I meant "the normal two-year timeframe".

It's possible to do an A level is less than two years, yes. It's just not advisable.

If you're determined to do one of them in seven months, then pick your strongest subject.