JEE

Your JEE score is decent for top colleges. Check the colleges through this link:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Kindly visit this link:
https://www.shiksha.com/college/school-of-engineering-and-technology-cmr-university-hennur-bagalur-road-bangalore-52030

Hi,
First of all congratulations, with 120/200 marks in NATA 2019 exams, 95 percentile in JEE Mains Paper 2 exam and 88% score in your class 12th, you can surely secure admission in very good colleges across the country. It would have been easier if you could have stated the state/ region, you are seeking to pursue your B.Arch programme. Check the link below to get a list of approved architecture colleges.
https://www.coa.gov.in/index1.php?lang=1&level=0&linkid=25&lid=26

Hi,
Yes, you can get admission in these colleges with this score. I will suggest you to go for PES College. It is one of the best colleges for architecture. Placement, infrastructure and faculty members are very good in this college.

Hi,
You can get private colleges with your JEE Mains score. To apply for Delhi University, you need to visit DU's official website and do the online registration.
To know other possible colleges, please click on the link below:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Yes, you can definitely get admission in Andhra University with your JEE Mains Paper 2 score. You should apply for the counselling process.
Best of luck.

No, there is no chance. After applying via OBC quota and home state quota also you are not eligible for the expected college and the desired branch. Since your rank is too high for admission in IIIT-D, you must secure a general category rank under 20000 then through OBC category and home state quota you have a chance.

It is hard to get CSE with this rank in any government college but you may try for NITs, Silchar, Mizoram, Meghalaya, and Nagaland.

MNNIT Jaipur is almost impossible. You should apply for some good private colleges. You can predict your possible colleges here:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best of luck.

I don't think so there is any engineering exam form fill up left now. In private, you can try for COMEDK exam which will give you private as well as government colleges of Karnataka.