Hello aspirant, hope you are doing good.

So, Banaras Hindu University, just like any other university in the country, takes students based on overall rank, with special category wise quota for people from different categories as well. Seats are reserved for Scheduled Caste (15%) and Scheduled Tribe (7.5%) candidates in each Course.

You can read this article for the entire list of all the reservations:

https://www.bhu.ac.in/academic_calender/Admission%20Procedure.pdf

If you want to know about all the colleges you can get into with your JEE Mains rank, you can get it here:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you. Good Luck!