Dear student,

Hello there, I hope you are doing well. You see BSC admission are based on the Mark's you get during your 12th board in most of the cases. So if you score well during your 12th class you are sure to get admission. The minimum cut off Mark's required are 55% actually but this can vary from institutions to institutions. Some colleges may keep a high cut off while few may keep it low, this also depends on which bacholes course you want like BSC in computer science  or chemistry, biology, physics or anything else. If you really want to do BSC and you are not getting admission this year there are 2 options at your disposal,

1. Try your admission next year.
2. Try in another neighbouring state like Goa.

This is 1 way out for you. If a situation arises when in you cant get admission than apply for some small time courses that will helps you be it in computer or diploma courses. Dont loose your touch with studies that's the main point. Or you can prepare for some entrance exams.

Hope this helps.