Hello aspirant!
Hope you are doing well!

Exam center allotment mostly depends on availability of seat in the centers and no. of candidates applying for the same.
the tripura students have only 1 center Agartala .So if you have filled Tripura as 1st choice you'll probably get Agartala

To refer to the list of all centers of AISEE, refer to https://school.careers360.com/exams/aissee