B.Com

You may prefer top DU affiliated colleges over Christ University for BCom Hons as DU has better brand value and opportunities for campus placement.

Last year, cutoff was 94% for general category.

After completing your B.Com, you can make career in the field of your interest.
If you want to study further, then there are too many options available like: CA, CS, MBA, M.Com, etc.
But if you want to do a job, then you should start preparation for government job exams like banking exams (PO, clerk, RRB, etc.), SSC exams (CGL, CHSL, etc.)
It will be a great option for you.
You can check the syllabus of bank clerk exam here: https://scoop.eduncle.com/ibps-clerk-syllabus-exam-pattern.

I would not be the right person to decide that. PGP admission office decides that. But just by my experience I would say that your 12th marks are not up to the mark for call. Still I would suggest you not to get demotivated and give your best in CAT and try for colleges like FMS.