Hello Sayeed,
Since this year's cutoffs are too high, with 168 and above marks required to get admission in B.sc Maths in AU. It is unlikely you would be able to get admission in AU main campus with 112 marks. Also according to your result in 12th, you are eligible since the required percentage is 50% aggregate.
More - https://university.careers360.com/articles/allahabad-university-cut-off
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