My CRL RANK- 41126 and OBC RANK- 10058.Is there possibility of nit? And any core branch ?

I hope the following links may help you :
1) JEE Main 2015 College Predictor
2) JEE Main Expected Marks or Rank to take admission in NIT Colleges 2015
3) List of colleges that accept JEE Main scores
4) JEE Main 2015 Participating Institutes

You can also find the closing ranks of various branches of different institutes (category-wise) from CENTRAL SEAT ALLOCATION BOARD( csab.nic.in ) website,for eg. http:// csab.nic.in /csab2014/PDF/Closing_Rank_After_Round_III.pdf

Yes, you have chances to get NITs.

To check which branch you can get based on your rank you can use below college predictor

JEE Main College Predictor

Good Luck!!