can anyone please suggest me how many hours should I give to NEET and 12 state board separately.

you should give just about 2-3 hours but in this hours you should give your best concentration.best of luck for your best.thank you.

I dont believe in marathon learning and there is no such thing like how many hours should I study?

Everyone has different capabilities, and capacities of learning. It depends on you only like how many hours you want to devote in your preparation seriously.

And if you are from state board then you need to cover the same topics first after that solve a few previous year board papers to get the idea about level of questions asked and also check your current level. Once your board is under control, you can start NEET preparation in parallel.

And just be confident and do not cram.

Good Luck!!!