IIT

If you score 250 in JEE Mains, then you got a very good rank in JEE Mains and not in JEE Advanced.
You must have to score good in JEE Advanced to get a good rank in this.
Good luck.

ISM is ranked 2nd in Asia for Earth Sciences and placements are very high paying and all major petroleum companies visit the campus, so in my opinion petroleum engineering.

Hello Rahul,
The following are the colleges for engineering physics in India except IITs:
1) Delhi technological university (DTU)
2) NIT calicut
3) Guru Gobind Singh Indraprastha University, Delhi
4) NIT warangal
5) Indian Institute of Space Science and Technology, Thiruvananthapuram
6) National Institute

The only problem you may face is relieving letter from college. As you are already enrolled in a private college and also with university so they might demand full four year fees from you.

To get admission on any IIT's you have to good rank on JEE(ADVANCE) or for NIT's you have to be meritorious on JEE (mains). then according to category reservation and cuttoff can get admission.

Just go for IIT, Maan after that think of UPSC an all, but if your main goal is UPSC, don't go to IIT.

Please refer to the link below:
https://www.shiksha.com/design/fashion-design/articles/preparation-tips-for-uceed-2017-blogId-11820