Hi Dear,

Bachelor in science is a three year undergraduate programme offered  by many institutes in India in different specializations. The cut off varies for each specialization depending on college to college. Please mention the name of the college in which you are interested to seek admission to know the details on cut off.

Good Luck

Hii!
The cutoff usually varies from college to college. Depending upon the mode of admission, that is, merit based or entrance exam based, cutoffs can vary. Bsc colleges across India take admissions as per vacancy in their college. So, there's not a specific cutoff we can talk of. But, the better you score in class 12th as well.as entrance exam in the relevant discipline, the better chances you have to get admission into the desired course. Also, if you specify the course and the name of the college you are interested in, we can provide you with the specific cut-offs.
Hope you understand.
Good luck!