Hello sir.
The cutoff for top nit is usually within a all India  rank of 20000. Whereas for nit's of eastern states it is however below 40000 . The cut off varies every year and so does the no of students so one cannot be 100% sure about the upcoming. You can go through the below link for a better understanding of previous years cutoffs for various nit's -

https://www.google.co.in/amp/s/engineering.careers360.com/articles/nits-cutoff-for-btech-civil-engineering%3famp

Thanku I hope it helps

Yes he can get college.and civil branch also

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