hello aspirant, 

There are a lot of options for you to choose from after opting for pcb in 12th standard:

1. MBBS, BDS, BHMS, BAMS, BUMS ( other medical courses that require you to appear for NEET exam)

2. BSc in Anthropology, Bio-Technology, Veterinary Science, Nursing, Physiotherapy, Medical Science, Speech and Language Therapy, Rehabilitation Therapy, Occupational Therapy, MLT-Medical Technology, Audiology, Microbiology, Genetics, Bio-informatics, Bio-Chemistry, Bio Medical Science

Out of all these courses, some of them require you to appear for separate entrance exams usually depending on the university/college you're aiming for. Otherwise, you just need to score well in your board exams to get admission for the courses.