Hii there!

The cut offs of AU and other affiliated colleges is generally more than 178. So to get admission, you have to score good in the entrance exam. Your score 126, is good but low for admission in AU.

Nevertheless, don't loose hope, keep a close check on the cut offs. Also check out this link for the previous year cut offs which will help you analyse which college you can get admission in.

https://university.careers360.com/articles/allahabad-university-cut-off

Hope this helps you.