Hii!
You can opt for a number of courses after passing class 12th with PCB and computer science as a subject combination. Some of the options are - medical - MBBS, BDS, bhms, bams; pharmacy, paramedical, computer applications, BCA, bioinformatics, forensics, biotechnology, biomedical,  physiotherapy, nutrition, dietics, psychology, research, government jobs, nursing, defence, etc.,
Hope this helps.
Good luck!