It depends upon which subject are you going to do BSC in. If you are choosing pure sciences then you  can go for research by applying for PHD. 

If you have a passion for teaching then you can apply in various schools, colleges , universities for teaching as a profession. 

If you are doing BSc IT or BSc Computer Science then you apply for jobs at MNCs or you can apply for entrance exams and further do MCA ( Master in Computer Applications ).

If you are taking biology ( botany or zoology ) or life sciences then you can apply for universities abroad and start researching as it's scope is infinte.

If you don't want to continue science and have a passion for business then you can prepare for CAT Examination and take admission in IIM.

If you want to do a Government job then you can prepare for exmas conducted by UPSC for IPS, IAS or you can also work in banking sector by applying for exam such as SSC.

If you want to join Indian Army then you can give NDA Eamination.

If you still have any queries feel free to ask in the comment section down below.