U asking about reference to get in to IIM.
u need to clear the CAT in General to apply for admission in IIM.
Either u r from BCOM /BA/BSC.
Minimum Requirements for CAT in 50% or above in Graduation.
Thanks,
Azim

Hi Aspirant,
There is absolutely no point in believing that b.sc students do not get into IIM's.
If a person if interested in MBA, then irrespective of his/her educational background he/she can go to IIM.So,my advice to you will be that if you are interested in it,then definitely prepare very well for CAT and try to reach there.
Hope this helps.