Hi

there are many interesting courses available for bsc after 12th PCM. And they can. Provide one with better opportunities as well in future. Bachelor's degree will help one to understand the basic and little more detailed knowledge about the subject one pursuing in science. Theoretically as well as there will be some daily life approches which wilo be there in your curriculum for sure.
One can do bachelor's in physics, chemistry, mathematics and also some detailed and precise subjects of like computer sciences, forensic sciences, etc.

List is as follows

Bsc Computer Science

Bsc Information Technology

Bsc . Chemistry

Bsc Mathematics

Bsc In Applied Physics

B.Sc. In Biochemistry

B.Sc. In Computer Science Statistics

Furthermore you can find out more about the courses from the link i am attaching below

https://www.google.com/url?sa=t&source=web&rct=j&url=https://school.careers360.com/articles/courses-after-12th-pcm/amp&ved=2ahUKEwi2perzv_7wAhWNcn0KHVgjCmUQFjAAegQIBBAC&usg=AOvVaw1M112gFBoqNI28Yv59mfVl&ampcf=1