Hey Shivam,

No matter if you are a science, commerce or arts students all can take admission in IIMs.

So after 12th you have to complete your graduation with 50% aggregate marks after that you have to give CAT( Common Admission Test) and you have to work hard coz you are from science stream.

All IIMs minimum CAT cutoff varies from 95% to 99%.

So work hard!

Hope it helps! Comment Down if you have any other queries... Goodluck!