Hii!
There are a number of career options you can opt for after completing class 12th with PCB subject stream. You can either go for Medical fields such as MBBS, BDS, BHMS, BAMS, BSc Nursing, Paramedicals etc., the admissio to which are provided via NEET UG entrance examination.
You can also choose fields such as Agriculture, forensics, general BSc in any Subject if your choice etc.,
You can go for Subjects from a different stream too, such as Law, business, entrepreneurship, Management, defence, journalism and mass communication, acting, fashion designing etc.,
Hope this helps.
Good luck!