Hello ,

All the three , IIM A, B,C are the top most three IIMs in the country , even all three IIMs come under top 200 global rankings , first is the IIM A at 46th rank , IIM B at 50th ,IIM C at 79 th rank , so you get any of the three , then your future is set and you can placed any of the top companies at a very high package , so you can choose any of the three , there is no big difference in any one of them , but if you need the detailed analysis of all the IIM s like courses , fees , structure , placements and many more then please refer the links below :

1) IIM AHMEDABAD :

https://www.google.com/amp/s/www.careers360.com/university/indian-institute-of-management-ahmedabad/amp

2) IIM BANGALORE :

https://www.google.com/amp/s/www.careers360.com/university/indian-institute-of-management-bangalore/amp

3) IIM CALCUTTA :

https://www.google.com/amp/s/www.careers360.com/university/indian-institute-of-management-calcutta/amp

hope it helps ,

Thank you