Hi Aman,

There is a proper process to enter or get admitted to IIMs.And IIMs offer Post graduate courses only.So you first need to graduate then only can you take admission IN IIM's basis your scores in exam like CAT.

Also the scores and marks in 10th, 12th and graduation do matter for entering IIMs.So you must first complete your graduation either in B.com or BBA for seeing eligible for admission in IIM.

Hope,it helps.

Thank you.