B.Tech

After class 12th, you can go for B.Tech in Mining Engineering branch. There are many institutes offering this course. ISM-Dhanbad is one of the best institutes for mining engineering.
Check the below link:
https://www.shiksha.com/b-tech/colleges/b-tech-in-mining-engineering-colleges-india

You have to visit the website of IIT in which you are going to take admission because every IIT has a little, but different fee structure. I will be providing you with the link, but please do visit the website of IIT once:
https://www.google.co.in/amp/s/www.shiksha.com/b-tech/articles/amp/iit-fee-structure-for-btech-blogId-6275

Hello Satyam,
As per your rank, the best college for is IEM-Kolkata, however, check here to know more:
https://www.shiksha.com/b-tech/resources/wbjee-college-predictor
All the best.

https://www.shiksha.com/search/?uaf[]=location&q=part-time B.tech colleges&s[]=2&qer=colleges|0|0|0|0|145,10|0|0|0|0|0|21|0|0|0|0&sa=^^0^145,10^0^0^0^0^0^21^0^0^0^0^0&tscs=1&sscs=1&ts=52496987&rf=filters&ct[]=64&bc[]=10&ed[]=et_21::dm_34&ed[]=et_21::dm_33&ed[]=et_21::dm_39
Here is your answer.

You should do B.Tech in computer science or information technology branch. B.Tech is far better than BCA.

First of all, give your 100% in B.Tech.
Then you should go for internships and all. Do online courses also in a specific field in which you are interested!
All the best!

If you can work for one more year with full dedication and motivation from people around you, then I would suggest take a drop and give your 100%. In the end, luck matters a lot. All the best!

https://www.google.co.in/amp/s/www.shiksha.com/b-tech/course/amp/b-tech-in-chemical-technology-guru-gobind-singh-indraprastha-university-dwarka-Delhi-108875?espv=1
the main campus does.
Hope this will help you

Universities those offer other degrees along with engineering named their engineering degree as BE (Bachelor of Engineering) and the institutes constituted for only engineering studies named their degree as B.Tech (Bachelor of Technology). BE is Bachelor of Engineering whereas B.Tech is Bachelor of Technology. So both are similar. There is no difference between them. Best of luck.
Thank you.