NIT

I think you should. I don't know if all the NITs have released their OBC and SC/ST cutoffs or not.

Hello Babli,
For admission into B.Arch programs in NITs and GFTIs you need to write JEE Mains paper 2 and yes, you need to clear it with a high score.
To get B.Arch in IITs you need to appear for 4 exams namely JEE Mains papers 1 and 2, then you need to clear JEE advanced and then you need to clear AAT (architecture aptitude test).

Hello Subhas,
As per your rank, you will get lower NITs, however, check here to know more.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

It depends on your JEE score and not on your board results.

Hello Rushikesh,
For admission into NITs, IIITs and GFTIs, your JEE Mains score alone is considered and not JEE Advanced score. So, if you mention your score and rank including category rank then I may tell whether you can get any NIT or not.

Hello Keerthi,
you are not eligible for admission into NITs. The minimum eligibility score is at least 75% overall and 75% in PCM.
As you don't meet the eligibility conditions, you are not eligible.

Hey,
Just visit josaa.nic.in to know the opening and closing ranks of NITs.

Admission in NIT is based on JEE Mains score. You may use following link to predict in which college you can get admission based on JEE Advanced score: https://www.resonance.ac.in/reso/news/jee-advanced-branch-allotment.aspx

Yes, it is necessary to give improvement exam of atleast 5 subjects to eligible for JEE. As this part is also mentioned in the JEE Mains information bulletin.