Hello Dilkhush,
With 200 marks in the B.A entrance for allahabad university in the OBC category, you can definitely get admission in the main campus of AU. As the cutoff for OBC is 154 marks and above. As for the hostel part you have a very good chance of getting a hostel too.
Cutoffs - https://university.careers360.com/articles/allahabad-university-cut-off
Hope this helps.
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