hi,

see while you choose  b.sc in computer science for graduation, computer science would be your major discipline of studies, however besides the major subject you have to take general elective subjects. based on  many university curriculum and availability of faculty the subjects options would be allotted to student. you may take subjects as mathematics, physics, economics as elective subjects.  the maths and physics syllabus would be higher than 12th standard since it is a bachelors level course. besides on your major papers work you have to give sufficient time to score a good points on elective papers as well.

hope it would help.

If you are opting for BSc computer science then you can take Physics and Mathematics as your General Elective or Minor paper. You will do the Major in Computer Science.

And the course will give a intensive study for you in the field of Computer Science which will be quite advanced.

I hope my answer helps. All the very best for your future endeavors!