I have passed in cbse exam for 61% eligible for nit at any one in India

Hello, even if you have got ranks in JEE Mains high enough to get you a seat in any NIT, IIITs , you won't get a seat even if you are from reserved category. The minimum percentage in boards for general category is 75% and for other reserved category is 65%. So please try out for private colleges like Sharda, Amity, Manipal etc.
Here's a list of some of the best private engineering colleges
https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/colleges/ranking/2018/top-private-engineering-colleges-in-India%3Fpage%3D1&ved=2ahUKEwjOpp7vroziAhW58HMBHXnBCFkQFjAMegQIAxAB&usg=AOvVaw3NwtBzswCY8zKWfTYYICX6

Hey R KishoreKumar,

For admissions to NITs/IIITs, Candidates need to have secured a minimum of 75% marks in Class 12 or any equivalent exam or be in the top 20 percentile in their class 12th Exam conducted by the respective board. For SC/ST Candidates, the eligibiltiy criteria is to secure 65% marks in Class 12th.

Good Luck.