Dear Tame,

It is very difficult to predict the college but according to you,  you got 87.6% in class 12 and you are belonging to ST category then you have ST category quota. But there is a  chance to get admission to Delhi University for B.A program. According to the previous year, the  cutoff of B.A program for ST category  in different colleges of Delhi University such as

Miranda House 98-99,

Ramjas College  91.5-92.5,

Daulat Ram college 78-94,

Hansraj College 91-93.5,

PGDAV College  83-87, etc.

To more information about DU and DU cutoff  :-

Delhi University (DU) Delhi: Admission 2021, Courses, Fee, Cutoff, Ranking, Placements & Scholarship (careers360.com)

DU Cut Off 2021 - Check Course, College and Round Wise Expected Cutoff (careers360.com)

Hope this information helps you...

Best of luck :)