IIM

To seek admission in IIMs you need to do the following:
1. Score 50% and more marks at your graduation examination
2. Appear for common admission test CAT & score more that 95 percentile
3. If you get a call from IIMs, then appear for PI (personal interview) & clear it
4. On successful completion of above steps you will get admission in IIMs.
All the best.

Dear Shubham,
Your CAT scores matter the most. The academic background of the student is considered at a later stage.
So, prepare for CAT. All the best.

Yes, they do accept best score of GMAT.
All the best.

Yes you can expect to get a call from IIM according to your scores. All the best.

Yes, there are chances that you can get a call from IIM, not from IIM-A but definitely from other IIMs.

The process of getting into IIM with GMAT score is little tricky. You need to work outside India for atleast 18 months and during CAT examination, you should not be in India. If you fulfill these criteria you can apply with GMAT Score.

You can appear for both CAT and XAT and seek admission in top 30 B Schools for excellent job opportunities. Please refer to following link for list of colleges which you can target: https://www.shiksha.com/mba/ranking/top-mba-colleges-india/2-2-0-0-0

You need a strong reason for that. That's the only possibility to get an admission.