If you want to apply for JEE Main Paper II You should have 1-Language, 2-Physics, 3-Mathematics (compulsory), 4-Any one of (Chemistry, Biology, Biotechnology, Technical Vocational Subject), 5-Any other subject. You need to have secured minimum 50% marks in these subjects in aggregate and 50% individually too.

You can check the further eligibility with the given below link.

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

If you are applying for NATA then as per the eligibility you should have passed 10+2 or equivalent exam with minimum 50% and Mathematics should be the compulsory subjects. You can check the further eligibility with the given below link.

https://engineering.careers360.com/articles/nata-eligibility-criteria

Good Luck!