Yes, there is a category wise reservation in ISI.

Following is the number of seats available for different categories for Bachelor’s courses:

Total seats : 50

General : 25

OBC-NCL : 14

SC : 7

ST : 4

There is a reservation in application fee also. Application fee for the General category candidates is Rs.1250 while for other category candidates, it is only Rs. 625.

Hope it helps.