CBSE

No, you can't get BIT Durg. Apart from BIT Durg, you can get many colleges on your rank basis. If you want to know the list of colleges on the basis of your rank. then click on these videos and watch it till the last:
https://youtu.be/3YAzEP1vgvQ
https://youtu.be/hOlit6Un7l0
After watching the video, follow the steps as described in the video.

As compared to CBSE, NIOS is bit harder to learn. The NIOS text books has difficult words and Unknown new words. The answers are too long.

Yes, you may try. Visit this link to check B.Arch colleges based upon your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
Then visit this link for various colleges which provides you brochure:
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india.

Yes, you have a very high chance of getting into CEPT.

It looks a little difficult getting a merit seat in Rizvi.
Visit this link to check B.Arch colleges based upon your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
Then visit this link for various colleges:
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india

As you have scored 78 in class 12th, so it is not possible to get admission in DU. So, go and check private universities and decide your course according to your interest.

School of planning and architecture only accepts JEE paper 2 scores and that too above 250 marks.

Hi Pragya, the minimum percentage required is 40% in India in Class XII or its equivalent. Also, it depends on the college or university you are applying for. Every college or university has their own requirements.

Dear Prashant, you are eligible for admission in B.Com course. The fee structure for B.Com is Rs. 30,000 p.a. For further details, you will receive a call soon.

https://googleweblight.com/i?u=https://www.shiksha.com/bba/colleges/bba-colleges-india&grqid=gYVeQpVV&s=1&hl=en-IN
Here is the link, where you will get list of the colleges accepting this marks. Visit the link and take admission in the college you want to. Good luck.