Hello. Your probable rank will be 42,102 - 46,102 and your probable category rank range will be 10431 - 12031. It is difficult to comment on the college/branch which you may get. For that you need to wait till April exam concludes. The Overall rank is predicted on the basis of expected total no. of students i.e.1150000 appearing for April exam session. The results predicted are for indicative purpose only and is based on historical analysis and past year trends. The actual result and the probable result may vary.

But according to this i can expect that you may qualify for JEE Advanced

Hello Sainath. Welcome to Careers360. First of all, congratulations for getting such an excellent score. I would like to tell you that the second exam of JEE MAINS will take place in the month of April. After that the final rank will be declared on the official website. The cutoffs will also be declared after the results comes out. However I am sharing a link in which you can check previous year NITs cutoffs. 

https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-top-nits/amp

Hope this answer helps. All the best for your future.