-hi tausif,
iits dont teach bsc. they teach msc. and for that they need to appear for a separate exam after doing their bsc called the iit jam. jam takes place in the month of feb every year for all the iits in india. however the criteria to appear for the exam for your subject and the number of seats of the subject in the iits differ .
this year iit kanpur is going to organise jam, here's the link for detailed information- https://jam.iitkgp.ac.in/
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