hi,

see your overall academic record is really good. however apart from this you have to bring a high score around 99 percentile in cat exam to get calls form top iims. however cutoff score changes every year and it depends on certain factors like number of applicants, questions difficulty level, seat matrix, students category and so on. however keep doing the hard work and you would get success. however I would suggest to apply for others management exam like MAT, XAT cmat as well.

to know about management entrance test follow the below link:

https://bschool.careers360.com/articles/top-mba-entrance-exams-you-must-take