NIT

Hello,
Hope you are doing well. Yes, definitely, you are eligible for any NIT for B.Arch. You should try for your state NIT if you want, otherwise go for other state NIT. Google the cut-off ranks for getting a seat in NIT or also you can try for IIITs for B.Arch.
All the best.

Assuming you are from general, chances are very less as there is a fixed no. of seats in only one branch, where almost the same no. of students applied as that for multiple branches in paper one.
Moreover, below are the colleges which have almost the same reputation as that of NITs and suit your marks-
MSRIT
NIT-Bhopal, Calicut, Hamirpur, Jaipur, Nagpur, Patna, Raipur, Rourkela, Trichy, Kozhikode,
VNIT,
SPA- Vijayawada, Bhopal, Delhi, Bhopal.
Mizoram University, Aizwal.
IIEST Shibpur.
The above are the top colleges which you are likely to get. These are all government or are government-aided.
Best of luck.

Frankly, you need 102 marks for OBC to get into NIT - Pondicherry to get into the 5-year integrated course for mechanical and around 115 for the 4-year course.
Moreover, kindly mention if you want to know about a specific college.

I am adding my own preferences too with it. DTU, IIIT-Hyderabad, IIIT-Allahabad, IIIT-Delhi, NIT-Allahabad and NSIT. Best of luck.

With general, you'll get NIT Pondicherry, Silchar or Manipur with mining and related such branches (non-technical).
Also, it's not worth getting into these, spending 4 years and a huge fee as well.
The best I can suggest is LMNIIT where you can easily get mechanical or civil easily.
Best of luck.

Dear,
With such rank, I don't think you'll get admission in NIT or IIIT in the CSE branch, but you can go through the previous year data on JoSAA website.
Hope for the best. All the best.

Yes, of course, you deserve admission in NIT. As per my information, you are eligible for admission in the best colleges.
For more information, you can go through the last year's seat allocation details at JoSAA website.
All the best.

I don't know about CBSE but as per my experience of HSC board, you need to contact your school from where you appeared for 12th. The form is same as the regular form of 12th, you just have to tick class improvement instead of fresh while filling it. You can appear for class improvement two times, in July/Oct and next Feb/Mar.
Hope this will help you.

Please check out this website for more information regarding the opening and closing ranks in various NITs in the past two years:
https://josaa.nic.in/Result/result/OpeningClosingRank.aspx
The minimum percentage required in the 12th class board exams is 75%. I will pass on the information if I get to know more.
All the best!

Yes, you have a high chance of getting a decent NIT. Your rank is fine and since you belong to a reserved category, you will have no trouble getting a good college.